| A | B |
|---|
| Spermatogenesis | the process by which sperm form in the testes |
| Semen | a mily-white mixture of sperm and the secretions of the testes, seminal vesicles, prostate gland, and bulbourethral glands |
| Secondary sex characteristics | the characteristics which appear at puberty and tend to distinguish men from women. These include the development of breasts, hairline patterns, facial shape, body shape, and the distribution of body hair |
| Puberty | A series of events which transforms a child intoa sexually mature adult |
| Anabolism | All the synthesis reactions which occur in the body |
| Catabolism | All the decomposition reactions which occur in the body |
| spermatogonium | a cell that begins spermatogenesis by undergoing miosis |
| secondary oocyte | a cell that will not complete meiosis II unless fertilization occurs |
| Sertoli cell | A cell that nourishes and feeds other cells during spermatogenesis |
| mesoderm cell | one of the three types of cells formed during the gastrula phase |
| Leydig cell | A cell that secretes testosterone |
| spermatid | A cell in the testes that has 23 chromosomes |
| trophoblast | A cell that will eventually be a part of the placenta in the fetus |
