Chapter 31
Keep it anonymous and legitimate!
Regulation of correct hormonal level must be maintained.
Produced where?
What is the primary purpose of this system? Where is sperm produced? What is the main hormone? When can a male begin production of sperm and father a child? What is the prostate? How is it checked? Why? What two things passes through the urethra? How can a male become sterile or unable ot father a child? What is semen? Alkaline or acidic
Gametes – sex cells Accessory organs Gonads - testes Genital ducts – epidydimis Accessory glands – cowper’s/bulbourethral Supporting structures – scrotum Perineum – between thighs – pg 897 (anterior pubis to posterior coccyx)
Male Reproductive System
Located in scrotum – one testicle in each of two scrotal pouches Functions – 1. Spermatogenesis by seminiferous tubules 2. Secretion of testosterone by interstitial cells
Head – chromosomal data Neck Midpiece Tail
Epididymis – coiled 16 ft. tube on top of testicle – duct for seminal fluid and production – maturation of sperm (motility) Vas deferens – tube extending from epididymis through abdomen and through posterior surface of bladder – excretory duct for seminal fluid – connects epididymis with ejaculatory duct Ejaculatory duct – passes through prostate and terminates at the urethra Urethra – passageway for semen and urine
Seminal vesicles – 5-7 cm long on posterior surface of bladder – secretes nutrient rich part of seminal fluid (60%) Prostate – doughnut-like encircling the urethra below bladder – adds slightly acidic, watery/opaque secretion to seminal fluid(30%) Bulbourethral – pea-shaped gland attached to urethra below prostate – secretes alkaline secretion (5%)
Scrotum contains testes, epididymis, lower portion of spermatic cord Muscles that support/elevate the scrotum – dartos and cremaster Penis – three cylindrical masses of erectile tissue (one contains the urethra) – function is for urinary and reproduction – erection occurs due to erectile tissue filling with blood due to stimulation Spermatic cords (internal) – located in inguinal crease – contains seminal duct, vessels, lymphatics and nerves
Consists of secretions from: testes, epididymis, seminal vesicles, prostate, cowper’s gland Each mm contains millions of sperm Passes from testes – epididymis- vas deferens-efaculatory duct- urethra
Reproduction begins at puberty Organ development in-utero Reproduction ability through old age Late adulthood will decline testosterone production which will effect appetite, muscle structure, fertility, etc.