Tissue Classification

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created 5 years ago by wyobeast
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Tissue types and locations
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Addipose Tissue

Location:
Under Skin
Around Kidney and eyeball
Within abdomen
In breast

Description: Matrix as in areolar, but very sparse; closely packed adipocytes, or fat cells, have nucleus pushed to the side by fat droplet

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Areolar Connective Tissue

Location:
Widely distributed under epithelia of body(e.g., forms lamina propria of mucous membranes); packages organs; surrounds capillaries

Description: Gel-like matrix with all three fiber types; cells include fibroblasts (fiber-forming cells), phagocytes, some white blood cells, and others

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Blood

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Bone

Location:
Bones

Description:
Hard, calcified matrix containing many collagen fibers; osteocytes lie in lacunae. Very well vascularized

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Cardiac Muscle

Location
Walls of the heart

Description: Branching, striated, generally uninucleate cells that interdigitate at specialized junctions (intercalated discs)

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Dense Fibrous

Location
Ligament
Tendon
Aponeroses

Description: Primarily parallel collagen fibers; a few elastin fibers; major cell type in the fibroblast

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Fibrocartilage

Location: Intervertebral discs; pubic symphisis; discs of knee joint.

Description: Matrix similar but less firm than in hyaline cartilage; thick collagen fivers predominate

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Nervous Tissue

Location:
Brain, spinal cord, and nerves

Description: Neurons are branching cells; cell processes that may be quite long extend from the nucleus-containing cell body; non-irritable supporting cells also contribute to nervous tissue

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Pseudostratified columnar epithelium

Location:
Nonciliated type in ducts of large glands,
parts of male urethra;
ciliated variety lines the trachea,
most of the upper respiratory tract.

Description: Single layer of cells of differing heights, some not reaching the free surface; nuclei seen at different levels; may contain goblet cells and bear cilia.

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Reticular connective tissue

Location:
Lymphoid organs(lymph nodes, bone marrow, and spleen)

Description: Network of reticular fibers in a typical loose ground substance: reticular cells predominate.

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Simple Columnar Epithelium

Location:
Nonciliated type lines most of the digestive tract (stomach to anal canal) and gallbladder;
Ciliated variety lines small bronchi and uterine tubes

Description: Single layer of tall cells with oval nuclei; some cells bear cilia; layer may contain mucus-secreting goblet cells.

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Simple cuboidal epithelium

Location:
Kidney tubules;
ducts of small glands;
ovary surface

Description: Single layer of cube-like cells with large, spherical central nuclei.

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Simple squamous epithelium

Location:
Kidney glomeruli;
air sacs of lungs;
lining of heart and blood vessels;
lining of ventral body cavity (serosae)

Description: Single layer of flattened cells with disc-shaped central nuclei and sparse cytoplasm; the simplest of epithelia.

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Skeletal muscle

Location:
In Skeletal muscle attached to bones or occasionally to skin

Description: Long, cylindrical, multinucleate cells; obvious striations.

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Smooth muscle

Location:
Mostly in the walls of hollow organs.

Description: Spindle-shaped cells with central nuclei; cells arranged closely to form sheets; no striations.

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Stratified squamous epithelium

Location:
Nonkeratinized type forms the moist lining of the esophagus, mouth, and vagina;
Keratinized variety forms the epidermis of the skin, a dry membrane.

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Transitional epithelium

Location:
Lines the ureters, bladder, and part of the urethra

Description: Basal cells cuboidal or columnar; surface cells dome-shaped or squamouslike, depending on how much the organ is stretched.