The Male Reproduction System

Internal and External Organs  Internal  Glands & Ducts-storage  Nourish  Transport sperm  External  Produce  Store  Release sperm  Sperm cell must unite with egg cell for reproduction to occur-FERTILIZATION

TESTES  2 Major Functions  Produce testosterone  Produce sperm  Testes located in scrotum  Sac of skin outside body  Scrotum protects testes  Cold-shrinks hold in body heat  Warm-larger to get rid of extra heat  Sperm need lower temp. to form & survive

EPIDIDYMIS  Sperm move from testes to epididymis  Located on back of testicle-network of tubes  Function  Stores sperm for several weeks until mature  4-6 weeks for full maturity

VAS DEFERENS  Sperm travel through vas deferens & combine with fluids from other sex glands  Extend from epididymis join at urethra  Urethra-tube passes through penis to outside of body  Carries both sperm & urine-valve prevents mixing

GLANDS & DUCTS  Seminal Vesicles  Glands near the bladder  Fluid from S.V. makes up 60% of semen  Provides source of energy keep sperm active  Cowper’s Gland  Located at base of penis  Clear fluid from C.G. 5% of semen  Lubricates urethra  Prostate Gland  Near bladder at midline of body  Milky-white fluid 35% of semen  Protects sperm through female reproductive tract

PENIS  External sex organ  2 parts  Shaft-main part of penis  Glans-tip of penis  Urine & semen exit body through urethra by action called ejaculation

Disorders of Male Reproductive System  Testicular Injury  Testicular or prostate Cancer  Undescended testes  Inguinal Hernia  Sterility  Enlarged Prostate Gland

Male Reproduction Diagram