testes, cells, hormones, epididymis, ductus deferens

components

testes, spermatic cord, glands, external genitalia

what do testes contain

contain seminiferous tubules that produce sperm

what are sperm stem cell

spermatogonia

what do sertoli cells do 

nurture sperm and maintain blood testes barrier 

what are sertoli cells stimulated by

FSH and testosterone

what do sertoli cells support 

spermatogenesis by providing nutrients and phagocytizing cytoplasm from sperm

what are leydic cells stimulated by 

stim by LH to produce testosterones 

what is spermatogenesis & where does it begin

cont process of sperm production (puberty to old age), begins at outermost cell layer and proceeds to lumen

what are the steps to making sperm (9 week) 

1. spermatogonia - sperm stem cells, undergo mitosis

2. spermatocytes - undergo meiosis

3. spermatids - undergo maturation 

4. spermatozoa - lose contact w/ wall and enter lumen (free swimmers)

parts of a mature sperm

head (has nucleus, chromosomes and acrosomal cups), middle piece (has mitochondria), tail (move cell)

testosterone - what does it stimulate, promote, establish, and maintain

stim spermatogenesis, promotes libido, establish male 2 sex characteristics, and maintain glands and organs of tract 

path of duct system

sperm from testes, duct deferens in spermatic cord, ejaculatory duct, urethra

epididymis - how long, function

7m long, transport sperm and protects (main storage)

ductus deferens - where does it start & how long, what is stored, and what is contained there

starts at epididymis tail, 18 inch long

sperm stored in suspended animation 

smooth muscle propel sperm and travel through inguinal canal