LEC 24 BIOL 431

testes and ovaries

Sperm and ovum

glands and ducts

Penis and vagina

Process in which spermatozoa are produced
takes 2-3 weeks
involves reduction of diploid to haploid via meiosis

Produce Sertoli cells and leydig cells
Keeps scrotum 3 degrees below body temp via dartos and cremaster muscle

They produce inhibin which regulates sperm production and are found in the testis

found between seminiferous tubules and produce testosterone

Ductus deferens
nerves
testicular artery
testicular veins (pampiniform plexus)
cremaster muscle

Diploid cell
23 chromosomes pairs
meiosis 1 occurs and splits pairs

Haploid cells having only 23 chromosomes which then become spermatids

Produced 300 mil / day
once ejaculated life expectancy = 48 hrs
stored for 10 days in ductus epidiymis

Head = contains all genetic material
Mid piece = contains mitochondria for energy
Tail / flagellum = propulsion

inhibin is hormone made by Sertoli cells of the testi
produced when sperm production is met and targets ant pit gland to inhibit ICSH and FSH which inhibits spermatogenisis

Secerets fructose rich fluid that contributes to sperms viability 60%

secrets alkaline solution to protect sperm in acidic vaginal environments 33%

Secerets alkaline substance to protect from acidic urethra envirmonet