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Sexual Reproductive Systems in Males and Females

1. Trace the pathway of a sperm from the male testes to the uterine tube of a female.

2. Fertilization involves much more than a mere restoration of the diploid chromosome number. What does the process of
fertilization entail on the part of both the egg and sperm? What are the effects of fertilization?

3. Why is the term urogenital system more applicable to males than to females?

4. Cleavage is an embryonic event that mainly involves mitotic division. How does cleavage differ from mitosis occuring during life after birth, and what are its important functions?

Solution Preview

1a. Pathway in the male: seminiferous tubules, straight tubules, rete testis, efferent ducts, ductus epididymis, vas deferens (terminal portion being the ampulla), ejaculatory ducts, urethra, external urethral orifice.

1b. Pathway in the female: vagina, external os, cervical canal, internal os, uterine cavity, isthmus of uterine tube, uterine tube.

2. Fertilization is the merging of the genetic material from the sperm cell and the secondary oocyte into a single nucleus. However, a sperm cell is not able to fertilize a secondary oocyte until it has undergone several changes inside the female reproductive tract. These changes are called capacitation. The acrosome membrane becomes fragile. Several enzymes are released from the acrosome. These enzymes are needed to penetrate the ...

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