Reproductive System

In: Science

Submitted By angelaline85
Words 2072
Pages 9
Functions of Reproductive System

❑ Procreate species ❑ Manufacture important hormones ❑ Pleasure

Stages of Life

← Embryologically, males and females start out “sexually indifferent” ← Gonads, ducts and externally identical structures ← At 5 weeks gestation changes start to take place ← Puberty: reproductive organs grow to adult size and reproduction becomes possible ← Between 10 and 15 ← Influence of rising levels of gonadal hormones ← Testosterone in males ← Estrogen in females

I. Male Reproductive System: Structure

← Scrotum ← Function: Protects the testes, epididymis, and spermatic cord ← Holds testes away from body ← Temperature: 1° below body temperature ← Lined with serous membrane that secrets fluid ← Testes move freely ← Penis ← Function ← Deliver sperms to female ← Urination ← Shaft ← Erectile tissues surround urethra ← Glans ← Cone-shaped structure on end of penis ← Prepuce (foreskin) ← Skin covering in uncircumcised males ← Epididymis ← Sits on top of each testis ← Receives spermatids from seminiferous tubules ← Spermatids become sperm cells ← Vas deferens ← Tube connected to epididymis ← Carries sperm cells to urethra ← Seminal vesicle ← Secrete ← Fluid rich in sugar used to make energy ← Prostaglandins – stimulate muscular contractions in female to propel sperm forward ← Seminal fluid ← Released into vas deferens just before ejaculation ← 60% of semen volume…...

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