BIOC19H3 Lecture Notes - Arginine, Photographic Film, Chromatin
Document Summary
Sperm cells are highly specialized, they can move around on their own and no other cells in the body can undergo independent motility. It occurs in the testes and in the seminiferous tubules. The central cavity is where the mature sperm cells are found. At the edge of the cell, there are stem cells (spermatogonia) they produce more stem cells, they stop dividing and begin to differentiate into sperm cells. As we go inward we see more and more mature sperm cells until we reach the center which holds the complete adult mature sperm cell. It occurs during a certain season of the year, like fish and amphibians. In humans and mammals it is going on all the time. (diagram -cross section of the testes) The testes are covered by protective layer (tunica). Inside, the different segments are divided by septa, contained in this are the seminiferous tubules.
