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What are the parts of a sperm cell?
Head: nucleus, highly compacted chromatin containing 23 chromosomes
Acrosome: enzymes helping sperm penetrate egg
Tail (Flagellum): lashing movements that propel
What is the epididymis?
- Coiled, threadlike tube from top of testis, then upwards forming the vas deferens.
- Immature sperm cells are stored here to mature.
What is the seminal vesicle?
-Saclike structure near base of bladder
-Secretes slightly alkaline fluid regulating pH of tubes for sperm travel
-Secretions contain fructose (sperm energy) and prostaglandins (stimulates uterus contractions)
What is the function of testosterone?
-Stimulates testes enlargement
-Stimulates male sex characteristics
What are male secondary sexual characteristics?
Body hair, enlargement of larynx and vocal cords, etc.
What are ovaries?
Solid, ovoid structures in shallow depressions in the lateral wall of the pelvic cavity
What are uterine tubes (fallopian tubes)?
Tubes extending into uterus coming from ovary.
Fimbriae: fringe the infundibulum
Infundibulum: encircles ovary
What structures are found in the umbilical cord and what do they do?
Two umbilical arteries and one umbilical vein transports blood between embryo and placenta
What role does progesterone play in pregnancy and childbirth?
More progesterone inhibits birth, less initiates it.
What is the placenta?
Organ that attaches the embryo to the uterine wall and exchanges gasses and wastes
The hormone responsible for the development and maintenance of male secondary sexual characteristics is
n the female reproductive cycle, menstrual flow occurs when the concentrations of
estrogen and progesterone are low.
Women athletes sometimes experience disturbances in their menstrual cycles because of
decreased synthesis of estrogens.
The American Cancer Society recommends that women have their breasts examined with mammography at regular intervals after the age of
Endometriosis can result in the formation of fibrous tissue around the ovaries and can prevent ovulation or obstruct the uterine tubes.
Sperm cells are produced by the germinal epithelial cells that line the ______________.
Following ovulation, the follicular cells of the ovary enlarge to form a structure called ______________.
Which of the following provides the main source of energy for a newborn during its first few days?
The cells of a blastocyst that give rise to the body of the developing offspring constitute the
Blood rich in oxygen and nutrients is transported from the placenta to the fetus in a(an)
The foramen ovale is an opening that allows fetal blood to pass from the
right atrium to the left atrium.
The substance used to induce the development of ovarian follicles during the in vitro fertilization procedure is most likely
human menopausal gonadotropin.
Drugs ingested by a pregnant woman most likely reach her fetus by passing through the
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