gametogenesis

exam 1

gametogenesis

formation of gametes

spermatogenesis

sperm production

oogenesis

egg development

germ cells

precursor cells

mitosis

cell replication (diploid → diploid)

meiosis

reduction division (diploid → haploid)

primary oocyte

initial egg stage

secondary oocyte

fertilizable egg; large cell produced by first meiotic division

polar bodies

byproducts of oogenesis; cell produced in the first or second meiotic division in female meiosis that contain little cytoplasm and do not become gametes

spermatogonium

sperm precursor

primary spermatocyte

initiating sperm cell

secondary spermatocyte

intermediate sperm cell

spermatids

developing sperm cell; four haploid cells produced by the meiotic divison of a primary spermatocyte

spermatozoa

mature sperm

fertilization

union of gametes

oogonia

mitotically active cells that produce primary oocytes

ovum

haploid cell produced by meiosis that becomes a functional gamete

spermatogonia

mitotically active cells in the gonads that give rise to spermatocytes

testes

develop in abdomen, descend into the scrotum

seminferous tubules

network of tubules located in testes

sertoli cells

form the walls of seminiferous tubules; support germ cells

leydig cells

adjacent to seminiferous tubules; support germ cells

seminal vesicles

pair of glands which open into the vas deferens near to its junction with the urethra; secrete many of the components of semenp

prostate gland

secrete prostate fluid, one of the components of semen