anatomy and pysiology reproduction
the cell division process, that produces, gametes--sperm or egg cells
meiosis, one cell with 46 for humans divides twice
half the usual number for humans 23
is the process of meiosis as it takes place in the testes, the site of sperm production.
within each testis are--that contain spermatogonia, which are stem cells that generate sperm.
it divides by mitosis to form two cells, one of which will remain in place as a stem cell, while the other differentiates specializes to become a primary spermatocyte that will undergo meiosis.
secretes gonadotropin-releasing hormone, which stimulates the anterior pituitary gland to secrete follicle-stimulating hormone and luteinizing hormone.
initiates sperm production, and testosterone, secreted by the testes when stimulated by LH, promotes the maturation of sperm.
produced by the testes, decrease the secretion of FSH
process of meiosis for egg cell formation; it begins in the ovaries and is also regulated by hormones.
when the ovaries atrophy and no longer respond to pituitary hormones
are located in the scrotum, a sac of skin between the upper thighs.
within the scrotum is about slightly lower than body temp, which is necessary for the production of viable sperm.
is the condition in which the testes fail to descend, and the result is sterility unless the testes are surgically placed in the scrotum.
on the tip of the head which is similar to a lysosome and contains enzymes to digest the membrane of an egg cell.
this canal is an opening in the abdominal wall for the--a connective tissue sheath that contains the ductus deferens, testicular blood vessels, and nerves.
receives sperm from the ductus deferens and secretion of the seminal vesicle on its own side.
posterior to the urinary bladder, their secretion contains fructose to provide an energy source for sperm and is alkaline to enhance sperm motility.
a muscular gland just below the urinary bladder.
also called cowper's glands are about the size of peas and are located below the prostate gland: they empty into the urethra.
the last part of the ducts through which semen travels, and it longest portion is enclosed within the penis.
these are a pair of oval structures about 1.5 inches long on either side of the uterus in the pelvic cavity.
this extends from the medial side of an ovary to the uterine wall.
one cell, a fertilized egg, which develops into an individual human being consisting of billions of cells.
the developing human individual from the time of implantation until the eighth week of gestation.
this fluid provides a cushion for the fetus against mechanical injury as the mother moves.
epidermis; hair and nail follicles; sweat glands, nervous system; pituitary gland; adrenal medulla, lens and cornea; internal ear, mucosa of oral and nasal cavities; salivary glands.
dermis; bone and cartilage, skeletal muscles; cardiac muscles; most smooth muscle, kidneys and adrenal cortex bone marrow and blood; lymphatic tissue; lining of blood vessels.
mucosa of esophagus, stomach, and intestines, epithelium of respiratory tract, including lungs, liver and mucosa of gallbladder thyroid gland; pancreas
human chorionic gonadotropin (hCG)
the first hormone secreted by the placenta, which produced by the chorion of the early embryo.
first stage of labor
dilation of the cervix, this last about 8 to 12 hours and your water breaks
Second stage of labor
delivery of the infant
third stage of labor
delivery of the placenta (afterbirth) within ten minutes of the birth of the baby.
if two alleles are the same and is--for that trait.
sickle cell anemia
the most genetic disease among people of African ancestry.
the embryonic stage that becomes implanted in the uterus is the:
the most superficial parts of the body develop from this primary layer:
a gene is the genetic code for one:
the fetal vessel that carries oxygen and nutrient from the placenta to the fetus is the:
both fetal and maternal tissues contribute to the formation of the:
40 weeks, the embryo-fetus is protected and nourished in the uterus of the mother.
a human begins life as one cell, a fertilized egg called a
women have the chromosomes
men have the chromosomes
a solid sphere of cells
mitosis proceeds and the sphere becomes hollow and is called
a fluid-filled blastocyst consist of an outer layer of cells called the--an an inner cell mass that contains the potential embryo
composed of sperm and secretion of seminal vessel, prostate gland, bulbourethral glands.
narrow lower end of the uterus, which opens into the vagina
upper portion layer central portion
serosa or epimetrium
outer layer is a fold of the peritoneum
smooth muscle layer, contract for labor
lining, forms the maternal parts of placenta
adjacent to the myometrium, is vascular but very thin
lost during menstral cycle.
receive sperm, from penis, exit for mentral blood flow, birth canal at end of pregnancy
breathing promotes greater pulmonary circulation, and the increased amount of blood returning to the left atrium closes the flap.
no longer receives blood from the umbilical vein and begins to constrict within a few minutes after birth.