Spermatogenesis
Where does spermatogenesis occur?
In the walls of the seminiferous tubules
Near the outer region of the wall of the of the seminiferous tubules lie cells called ________________.
Spermatogonia
Each spermatogonium is capable of undergoing either mitosis or meiosis at any given time. What is the mitosis and meiosis for?
Mitosis to replenish their numbers
Meiosis to produce spermatozoa
Spermatogonia first ______ the DNA within the _____ nucleus. At the same time, they are undergoing ________ to prep for cell division.
Replicate
Diploid
Cell growth
After meiosis 1 occurs, _____ cells result, each with a ______ number of chromosomes because the homologous pairs are seperated. Each chromosome still exists as a pair of _______, so there is another division, ________.
2
Haploid
Chromatids
Meiosis 2
During meiosis 2, the ________ get seperated. How many cells are created? What is their ploidy?
Chromatids
4 haploid cells created
Once meiosis is completed, each cell must differentiate into a __________.
Motile spermatozoon
Cells remain in the ____________ while they form flagellum and acrosome. What is inside the acrosome?
Seminiferous tubules
Hydrolytic enzymes needed for fertilization
The developing spermatozoa need nutrients, so they remain attached to cells in the seminiferous tubules called _______ cells.
Sertoli
Once the spermatozoa complete __________, they detach from the sertoli cells. Then, they move through the ______ to the storage area of the testes called the ___________.
Differentiation
Lumen
Epididymis