chapter 16: male reproductive

the reproductive role of the male is

to produce sperm cells or spermatozoa

then deliver these gametes to the female reproductive tract

what is the Gonads of the male?

Testes

Scrotum

where the testis hang

smooth muscle for optimal temp

normal sperm production requires which temperature?

3 degrees celcius

Epididymis

highly coiled duct

where the sperm mature and are stored

Bulbourethral glands

lubricate the spongy urethra for the passage of the ejaculate

Corpus spongiosum

dorsal column surrounding the urethra

each testis is covered by a dense connective tissue capsule and is composed of

Many coiled seminiferous tubules

what is spermatogenesis?

the process of sperm production that occurs in the seminiferous tubules

what are the most immature cells:

Spermatogonia

located near the basement membrane

spermatogonia is made when:

it remains dormant during childhood and begin actively producing sperm at puberty around 10-12 years

spermatogonia begin to divide by mitosis to increase their numbers and form

primary spermatocytes

Primary spermatocytes

give rise to four sperm cells

undergoes meiosis I to produce two haploid secondary spermatocytes which undergo meiosis II to produce four haploid spermatids

steps of Spermatogenesis

1. Primary spermatocyte

2. secondary spermatocytes

3. spermatids

4. spermatozoa