Abductors
Muscles that separate the fingers
Abductor Hallucis
Muscle of the foot that moves the toes and help maintain balance while walking and standing.
Adductors
Muscles at the base of each finger that draw the fingers together.
Anabolism
Constructive metabolism; the process of building up larger molecules from smaller ones.
Anatomy
Study of human body structure that can be seen with the naked eye, and what they are made up of; the science of the structure of organisms, or of their parts.
Angular Artery
Supplies blood to the side of the nose.
Anterior Auricular Artery
Supplies blood to the front part of the ear.
Anterior Tibial Artery
See "popliteal artery."
Anterior Tibial Nerve
See "deep peroneal nerve."
Arteries
Thick-walled, muscular, flexible tubes that carry oxygenated blood away from the heart to the capillaries.
Atrium
The upper thin walled chambers of the heart.
Auricularis Anterior
Muscle in front of the ear that draws the ear forward.
Auricularis Posterior
Muscle behind the ear that draws the ear backward.
Auricularis Superior
Muscle above the ear that draws the ear upward.
Auriculotemporal Nerve
Affects the external ear and skin above the temple, up to the top of the skull.
Autonomic Nervous System
The part of the nervous system that controls the involuntary muscles; regulates the action of the smooth muscles, glands. blood vessels, and heart.
Axon
The extension of a neuron by which impulses are sent away from the nerve cell.
Belly (muscle)
Middle part of a muscle.
Bicep
Muscle producing the contour of the front and inner side of the upper arm.
Blood
Fluid circulating through the circulatory system (heart, veins, arteries, and capillaries).
Blood Vascular System
Group of structures (heart, arteries, veins, and capillaries) that distribute blood throughout the body.
Body Systems
Groups of bodily organs acting together to perform one or more functions. The human body is composed of 10 major systems.
Brain
Part of the central nervous system contained in the cranium; largest and most complex nerve tissue; controls sensation, muscles, gland activity, and the power to think and feel emotions.
Buccal Nerve
Affects the muscles of the mouth.
Buccinator Muscle
Thin, flat muscle of the cheek between the upper and lower jaw that compresses the cheeks and expels air between the lips.
Capillaries
Thin-walled blood vessels that connect the smaller arteries to the veins.
Cardiac Muscle
The involuntary muscle that is the heart.
Carpus
The wrist; flexible joint composed of a group of eight small, irregular bones held together by ligaments.
Catabolism
The phase of metabolism that involves the breaking down of complex compounds within the cells into smaller ones resulting in the release of energy to perform functions such as muscular movement or digestion.
Cell Membrane
Part of the cell that encloses the protoplasm capable of performing all the fundamental functions of life.
Cell
Basic unit of all living things; minute mass of protoplasm capable of performing all the fundamental functions of life.
Central Nervous System
Consists of the brain, spinal cord, spinal nerves, and cranial nerves.
Cervical Cutaneous Nerve
Located at the side of the neck, affects the front and sides of the neck as far down as the breastbone.
Cervical Nerves
Affect the side of the neck and the platysma muscle.
Cervical Vertebrae
The seven bones of the top part of the vertebral column, located in the neck region.
Circulatory System
System that controls the steady circulation of the blood through the body by means of the heart and blood vessels.
Clavicle
Collarbone; bone joining the sternum and scapula.
Common Carotid Artery
Artery that supplies blood to the face, head, and neck.
Common Peroneal Nerve
A division of the sciatic nerve that extends from behind the knee to wind around the head of the fibula to the front of the leg where it divides into two branches.
Connective Tissue
Fibrous tissue that binds together, protects, and supports the various parts of the body such as bone, cartilage, and tendons.
Corrugator Muscle
Muscle located beneath the frontalis and orbicularis oculi that draws the eyebrow down and wrinkles the forehead vertically.
Cranium
An oval, bony case that protects the brain.
Cytoplasm
All the protoplasm of a cell except that which is in the nucleus; the watery fluid that contains food material necessary for growth, reproduction, and self-repair of the cell.
Deep Peroneal Nerve
A nerve that extends down the front of the leg, behind the muscles. It supplies impulses to these muscles and also to the muscles and skin on the top of the foot and adjacent sides of the first and second toes.
Deltoid
Large triangular muscle covering the shoulder joint that allows the arm to extend outward and to the side of the body.
Dendrites
Tree-like branching of nerve fibers extending from a nerve cell; short nerve fibers that carry impulses toward the cell.
Depressor Labii Inferioris Muscle
Muscle surrounding the lower lip; depresses the lower lip and draws it to one side.
Diaphragm
Muscular wall that separates the thorax from the abdominal region and helps control breathing.
Digestive system
The mouth, stomach, intestines, and sailivary and gastric glands that change food into nutrients and wastes.
Digit
A finger or toe.
Digital Nerve
Nerve that, with its branches, supplies the fingers and toes.
Dorsal
A nerve that extends up from the toes and the foot, just under the skin, supplying impulses to toes and foot, as well as the muscles and skin of the leg, where it is called the superficial peroneal nerve or the musculo-cutaneous nerve.
Dorsal Cutaneous Nerve
See "dorsal"
Dorsalis Pedis Artery
See "popliteal"
Endocrine System
Group of specialized glands that affect the growth, development, sexual activities, and health of the entire body.
Epicranial Aponeurosis
Tendon that connects the occipitalis and frontalis.
Epicranius
The broad muscle that covers the top of the skull consists of the occipitalis and frontalis.
Epithelial Tissue
Protective covering on body surfaces, such as the skin, mucous membranes, and the lining of the heart, digestive and respiratory organs, and glands.
Ethmoid Bone
Light spongy bone between the eye sockets and forms part of the nasal cavities.
Excretory System
Group of organs including the kidneys, liver, skin, intestines, and lungs that purify the body by the elimination of waste matter.
Exhalation
The act of breathing outward, expelling carbon dioxide from the lungs.
Exocrine (duct) Glands
Duct glands that produce a substance that travels through small tube-like ducts, such as the sudoriferous (sweat) glands and the sebaceous (oil) glands.
Extensors
Muscles that straighten the wrist, hand, and fingers to form a straight line.
Extensor digitorum brevis
Muscle of the foot that moves the toes and help maintain balance while walking and standing.
Extensor digitorum longus
Muscle that bends the foot up and extends the toes.
External carotid artery
Supplies blood to the anterior (front) parts of the scalp, ear, face, neck, and side of the head.
External jugular vein
Vein located at the side of the neck that caries blood returning to the heart from the head, face, and neck.
Facial artery
Supplies blood to the lower region of the face, mouth, and nose.
Femur
A heavy, long bone that forms the leg above the knee.
Fibula
The smaller of the two bones that form the leg below the knee. The fibula may be visualized as a "bump" on the little toe side of the ankle.
Fifth cranial nerve (also known as trifacial or trigeminal)
The chief sensory nerve of the face, and serves as the motor nerve of the muscles that control chewing.
Flexors
Extensor muscles of the wrist involved in flexing the wrist.
Flexor digitorum brevis
Muscle of the foot that moves the toes and help maintain balance while walking and standing.
Frontal artery
Supplies blood to the forehead and upper eyelids.
Frontal bone
Forms the forehead.
Frontals
Anterior (front) portion of the epicranius; muscle of the scalp that raises the eyebrows, draws the scalp forward, and causes wrinkles across the forehead.
Gastrocnemius
Muscle that is attached to the lower rear surface of the heel and pulls the foot down.
Glands
Specalized organs that remove certain constituents from the blood to convert them into new substances.
Greater auricular nerve
Located at the side of the neck, affects the face, ears, neck, and parotid gland.
Greater Occipital Nerve
Located in the back of the head, affects the scalp as far up as the top of the head.
Heart
Muscular cone-shaped organ that keeps the blood moving within the circulatory system.
Hemoglobin
Iron-containing protein in red blood cells that binds to oxygen.
Histology
Science of the minute structures of organic tissues; microscopic anatomy.
Hormones
Secretions produced by one of the endocrine glands and carried by the bloodstream or body fluid to another part of the body to stimulate a specific activity.
Humerus
Uppermost and largest bone in the arm, extending from the elbow to the shoulder.
Hyoid Bone
U-shaped bone at the base of the tongue that supports the tongue and its muscles.
Inferior labial artery
Supplies blood to the lower lip
Infraorbital Artery
Supplies blood to the muscles of the eye.
Infraorbital nerve
Affects the skin of the lower eyelid, side of the nose, upper lip, and mouth.
Infratrochlear Nerve
Nerve that affects the membrane and skin of the nose.
Inhalation
The breathing in of air.
Insertion
Part of the muscle at the more movable attachment to the skeleton.
Integumentary System
The skin and its accessory organs, such as the oil and sweat glands, sensory receptors, hair, and nails.
Internal Carotid Artery
Supplies blood to the brain, eyes, eyelids, forehead, nose, and internal ear.
Internal Jugular Vein
Vein located at the side of the neck to collect blood from the brain and parts of the face and neck.
Joint
Connection between two or more bones of the skeleton.
Lacrimal Bones
Small, thin bones located at the front inner wall of the orbits (eye sockets).
Latissimus Dorsi
Broad, flat superficial muscle covering the back of the neck and upper and middle region of the back, controlling the shoulder blade and the swinging movements of the arm.
Levator Anguli Oris
Also known as caninus, a muscle that raises the angle of the mouth and draws it inward.
Levator labii superioris
Also known as quadratus labii superioris, a muscle surrounding the upper lip; elevates the upper lip and dilates the nostrils, as in expressing distaste.
Liquid tissue
Body tissue that carries food, waste products, and hormones (i.e., blood and lymph).
Lungs
Spongy tissues composed of microscopic cells in which inhaled air is exchanged for carbon dioxide.
Lymph
Clean yellowish fluid that circulates in the lymph spaces (lymphatic) of the body; carries waste and impurities away from the cells.
Lymph Nodes
Special structures found inside the lymphatic vessels that filter lymph.
Lymph Vascular System
Body system that acts as an aid to the blood system and consists of the lymph spaces, lymph vessels, and lymph glands.
Mandible
Lower jawbone; largest and strongest bone of the face.
Mandibular Nerve
Affects the muscles of the chin and lower lip.
Masseter
Muscles that coordinate with the temporalis muscles in opening and closing the mouth, and are sometimes referred to as chewing muscles.
Maxillae (singular; maxilla)
Bones of the upper jaw.
Maxillary Nerve
Branch of the fifth cranial nerve that supplies the upper part of the face.
Median Nerve
Nerve that supplies the arm and hand.
Mental Nerve
Affects the skin of the lower lip and chin.
Mentalis
Muscle that elevates the lower lip and raises and wrinkles the skin of the chin.
Metabolism
Chemical process taking place in living organisms whereby the cells are nourished and carry out their activities.
Metacarpus
Bones of the palm of the hand; parts of the hand containing five bones between the carpus and phalanges.
Metatarsal
One of three subdivisions of the foot comprised of five bones, which are long and slender, like the metacarpal bones of the hand, help make-up the foot. All three subdivisions comprise 26 bones.
Middle temporal artery
Supplies blood to the temples.
Mitosis
Cells dividing into two new cells (daughter cells); the usual process of cell reproduction of human tissues.
Motor Nerves
Nerves that carry impulses from the brain to the muscles.
Muscular System
Body system that covers, shapes, and supports the skeleton tissue; contracts and moves various parts of the body.
Muscular tissue
Tissue that contracts and moves various parts of the body.
Myology
Science of the nature, structure, function, and diseases of the muscles.
Nasal bones
Bones that form the bridge of the nose.
Nasal nerve
Affects the point and lower side of the nose
Nerves
Whitish cords made up of bundles of nerve fibers held together by connective tissue, through which impulses are transmitted.
Nerve tissue
Tissue that controls and coordinates all body functions.
Nervous System
Body system composed of the brain, spinal cord, and nerves; controls and coordinates all other systems and makes them work harmoniously and efficiently.
Neuron
Nerve cell; basic unit of the nervous system, consisting of cell body, nucleus dendrites, and axon.
Neurology
Science of the structure, function, and pathology of the nervous system.
Nonstriated Muscle
Also called involuntary or smoth muscle; muscle that functions automatically without conscious will.
Nucleus
Dense, active protoplasm found in the center of the cell; plays an important part in cell reproduction and metabolism.
Occipital Artery
Supplies blood to the skin and muscles of the scalp and back of the head up to the crown.
Occipital Bone
Hindmost bone of the skull, below the parietal bones; forms the back of the skull above the nape.
Occipitalis
Back of the epicranius; muscle that draws the scalp backward.
Ophthalmic Nerve
Branch of the fifth cranial nerve that supplies the skin of the forehead, upper eyelids, and interior portion of the scalp, orbit, eyeball, and nasal passage.
Orbicularis oculi muscle
Ring muscle of the eye socket; enables you to close your eyes.
Orbicularis oris muscle
Flat band around the upper and lower lips that compresses, contracts, puckers, and wrinkles the lips.
Organs
Structures composed of specialized tissues and performing specific functions.
Origin
Part of the muscle that does not move; it is attached to the skeleton and is usually part of a skeletal muscle.
Os
Bone.
Osteology
The study of anatomy, structure, and function of the bones.
Palatine bones
Form the floor and outer wall of the nose, root of the mouth, and floor of the orbits.
Parietal Bones
Form the sides and top of the cranium.
Parietal Artery
Supplies blood to the side and crown of the head.
Patella
Also called the accessory bone, forms the knee cap joint.
Pectoralis major, pectoralis minor
Muscles of chest that assist the swinging movements of the arm.
Pericardium
Double-layered membranous sac enclosing the heart.
Peripheral Nervous System
Systems of nerves and ganglia that connects the peripheral parts of the body to the central nervous system; it has both sensory and motor nerves.
Peroneus Brevis
Muscle that originates on the lower surface of the fibula. It bends the foot down and out.
Peroneus longus
Muscle that covers the outer side of the calf and inverts the foot and turns it outward.
Phalanges
Bones of the fingers or toes (singular:phalanx).
Physiology
Study of the functions or activities performed by the body's structures.
Plasma
Fluid part of the blood and lymph that carries food and secretions to the cells.
Platelets
Blood cells that aid in the forming of clots.
Platysma Muscle
Broad muscle extending from the chest and shoulder muscles to the side of the chin; responsible for lowering the lower jaw and lip
Popliteal artery
Divides into two separate arteries known as the anterior tibial (TIB-ee-al) and the posterior tibial. The anterior tibial goes to the foot and becomes the dorsalis pedis which supplies the foot with blood.
Posterior Auricular Artery
Supplies blood to the scalp, the area behind and above the ear, and the skin behind the ear.
Posterior Auricular Nerve
Affects the muscles behind the ear at the base of the skull.
Posterior Tibial Artery
See "popliteal artery."
Procerus
Covers the bridge of the nose, lowers the eyebrows, and causes wrinkles across the bridge of the nose.
Pronators
Muscles that turn the hand inward so that the palm faces downward.
Protoplasm
Colorless jelly-like substance found inside cells in which food elements such as protein, fats, carbohydrates, mineral salts, and water are present.
Pulmonary Circulation
Blood circulation from heart to lungs to be purified.
Radial Artery
Artery that supplies blood to the thumb side of the armm and the back of the hand
Radial Nerve
Supplies the thumb side of the arm and back of the hand.
Radius
Smaller bone in the forearm on the same side as the thumb.
Red blood cells
Blood cells that carry oxygen from the lungs to the body cells.
Reflex
Automatic nerve reaction to a stimulus that involves the movement of specific muscles as a response to impulses carried along a motor neuron to a muscle, causing a spontaneous reaction.
Reproductive system
Body system responsible for processes by which plants and animals produce offspring.
Respiration
Act of breathing; the exchange of carbon dioxide and oxygen in the lungs and within each cell.
Respiratory System
Body system consisting of the lungs and air passages; enables breathing, supplying the body with oxygen and eliminating carbon dioxide wastes.
Ribs
Twelve pairs of bones forming the wall of the thorax.
Risorius
Muscle of the mouth that draws the corner of the mouth out and back, as in grinning.
Saphenous Nerve
Supplies impulses to the skin of the inner side of the leg and foot.
Scapula
One of a pair of shoulder blades; a large, flat, triangular bone of the shoulder.
Sensory (afferent) nerves
Nerves that carry impulses or messages from the sense organs to the brain, where sensations of touch, cold, heat, sight, hearing, taste, smell, pain, and pressure are experienced.
Serratus Anterior
Muscle of the chest that assists in breathing and in raising the arm.
sKELETAL sYSTEM
Physical foundation of the body, comprised of 206 bones that vary in size and shape and are connected by movable and immovable joints.
Smaller Occipital Nerve
Located at the base of the skull, affects the scalp and muscles behind the ear.
Soleus
Muscle that originates at the upper portion of the fibula and bends the foot down.
Sphenoid Bone
Joins all of the bones of the cranium together.
Spinal cord
The portion of the central nervous system that originates in the brain, extends down to the lower extremity of the trunk, and is protected by the spinal column.
Sternocleidomatoideus
Muscle of the neck that lowers and rotates the head.
Sternum
Breastbone; flat bone that forms the ventral (front) support of the ribs.
Striated muscle
Also called voluntary or skeletal muscle; muscle that is consciously controlled.
Submental Artery
Supplies blood to the chin and lower lip.
Superficial peroneal nerve
A nerve that extends down the leg, just under the skin, suupplying impulses to the muscles and the skin of the leg, as well as to the skin and toes on the top of the foot.
Superficial Temporal Artery
Artery that supplies blood to the muscles of the front, side, and top of the head.
Superior labial artery
Supplies blood to the upper lip and region of the nose.
Supinator
Muscle of the forearm that rotates the radius outward and the palm upward.
Supraorbital Artery
Supplies blood to the upper eyelid and forehead.
Supraorbital Nerve
Affects the skin of the forehead, scalp, eyebrow, and upper eyelid.
Supratrochlear Nerve
Affects the skin between the eyes and upper side of the nose.
Sural Nerve
Supplies impulses to the skin on the outer side and back of the foot and leg.
Systematic Circulation
Circulation of blood from the heart throughout the body and back again to the heart; also called general circulation.
Talus
One of three bones that comprise the ankle joint. The other two bones are the tibia and fibula.
Tarsal
One of the three subdivisions of the foot comprised of seven bones (talus, calcaneous, navicular, three cuneiform bones, and the cuboid). All three subdivisions comprise 26 bones.
Temporal Bone
Form the sides of the head in the ear region.
Temporal Nerve
Affects the muscles of the temple, side of the forehead, eyebrow, eyelid, and upper part of the cheek.
Temporalis
Temporal muscle; one of the muscles involved in mastication (chewing).
Thorax
The chest; elastic, bony cage that serves as a protective framework for the heart, lungs, and other internal organs.
Tibia
The larger of the two bones that form the leg below the knee. The tibia may be visualized as a "bump" on the big-toe-side of the ankle.
Tibial Nerve
A division of the sciatic neerve that passes behind the knee. It subdivides and supplies impulses to the knee, the muscles of the calf, the skin of the leg, and the sole, heel, and underside of the toes.
Tibialis Anterior
Muscle that covers the front of the shin. It bends the foot upward and inward.
Tissue
Collection of similar cells that perform a particular function.
Transverse Facial Artery
Supplies blood to the skin and masseter.
Trapezius
Muscle that covers the back of the neck and upper and middle region of the back; rotates and controls swinging movements of the arm
Triangularis
Muscle extending alongside the chin that pulls down the corner of the mouth.
Tricep
Large muscle that covers the entire back of the upper arm and extends the forearm.
Turbinal Bones
Thin layers of spongy bone on either of the outer walls of the nasal depression.
Ulna
Inner and larger bone of the forearm, attached to the wrist and located on the side of the little finger.
Ulnar Artery
Artery that supplies blood to the muscle of the little finger side of the arm and palm of the hand.
Ulnar Nervve
Nerve that affects the little finger side of the arm and palm of the hand.
Valves
Structures that temporarily close a passage, or permit blood flow in one direction only.
Veins
Thin-walled blood vessels that are less elastic than arteries; veins contain cup-like valves to prevent backflow and carry impure blood from the various capillaries back to the heart and lungs.
Ventricle
The lower thick-walled chambers of the heart.
Vomer bone
Flat thin bone that forms part of the nasal septum.
White blood cells
Blood cells that perform the function of destroying disease-causing microorganisms.
Zygomatic/Malar Bones
Form the prominene of the cheeks; cheekbones.
Zygomatic Nerve
Affects the muscles of the upper part of the cheek.
Zygomaticus
Muscles extending from the zygomatic bone to the angle of the mouth; elevate the lip, as in laughing.