How are male and female reproductive systems functionally different?
In males, the gonads (testes) secrete androgens and produce hundreds of millions of gametes (sperm) each day. The sperm are mixed with secretions, forming semen, and are expelled from the body during ejaculation into the female. In females, the gonads (ovaries) secrete estrogen and progesterone and release a single ovum (gamete) every month. The vagina receives the penis during sexual intercourse and the ejaculate is deposited near the external os of the uterus. If the ovum is fertilized and implants in the endometrium, the female's body nourishes the development of the embryo and fetus until birth.
You might also like to view...
Vomiting, diarrhea and flushing are caused by
A) excess niacin. B) a deficiency of iron. C) excess vitamin C. D) a lack of calcium.
A receptor cell initially develops a generator potential by the influx of potassium
Indicate whether the statement is true or false
True or False? The enteric nervous system acts independently of the CNS to control local reflexes in the digestive tract.
Answer the following statement true (T) or false (F)
The heart is ________ to the lungs
A) lateral B) medial C) posterior D) proximal E) distal