IntermediateStreaming Video - 2013
Key male reproductive organs include the testes, urethra, vas deferens, prostate gland, seminal vesicles, and penis. The testes contain coiled structures called seminiferous tubules, which are the sites of sperm production. A woman's ovaries usually produce only one egg per month, while a man's seminiferous tubules produce more than 12 billion sperm per month. On top of the seminiferous tubules is the epididymis. The immature sperm migrate there to mature, and after maturing they are stored there. The migration of the sperm from the seminiferous tubules to the epididymis usually takes about 20 days. Before intercourse, the penis fills with blood and becomes erect. With sufficient stimulation, an ejaculatory process begins. Mature sperm travel from the epididymis through the vas deferens, which is a narrow, muscular tube about 18 inches long. Its smooth muscle contractions propel the sperm forward.
Publisher: New York, N.Y. : Films Media Group, , c2010
Characteristics: 1 streaming video file (2 min.) :,sd., col