Pre-Ejaculation What’s the purpose of pre-ejaculatory fluid? If contraceptives are not used, can a woman become pregnant from pre-ejaculatory fluid? If a man has a vasectomy, can they still ejaculate? If so, what makes up the ejaculate?
Male Reproduction System Function – to produce a sperm cell Male reproduction cell Sperm cell unites with a female egg (ovum) to form a fertilized ovum Production starts at puberty (ages 12-15) Testosterone causes the testes to produce sperm Spermatogenesis – produce sperm for the rest of his life
External Male Reproduction Organs Testes – male sex glands, manufacture the male sex hormone – testosterone and produce male reproduction cell – sperm Scrotum – sac that hold the testes.
Testes Seminiferous tubules – sperm is produced in this section of the testes 500 million each day Epididymis – stores newly produced sperm 64 days for sperm to fully mature
Penis Tubelike organ that functions in sexual reproduction, sexual pleasure and elimination of body wastes. Erections – blood fills three cylinders which surround the urethra Ejaculation – release of reproduction fluids Penis size varies from male to male
Circumcision Fold of skin that covers the end of the penis (born with) Surgical removal of the foreskin
Internal Male Reproductive Organs Vas Deferens – a long tube that connects the epididymis with the urethra Seminal Vesicles – Two little pouches just above and either side of the prostate gland, they secrete a fluid that mixes with sperm- the fluid travels down the ejaculatory duct to mix with the sperm Prostate Gland – below the bladder and surrounds the urethra, secretes a milky and alkaline fluid that mixes with sperm (size of a chestnut) Cowper’s Gland – glands that open into the urethra, secrete a clear and sticky fluid that will cleanse the urethra of acid from urine Urethra – tubelike organ that travels through the penis and leads to the ejaculatory ducts, passage way for sperm and urine Semen – mixture of fluids from the seminal vesicles, prostate gland and Cowper’s gland
Concerns about the Male Reproduction System Nocturnal Emissions Hernia – pushing of a part of the body through the muscle wall that normally contains it Inguinal hernia – weak spot in the abdominal wall near the top of the scrotum. Part of the intestine may push through
Concerns Sterility – weak or malfunctioning sperm Temperature changes Certain chemicals Smoking Contracting mumps as an adult Untreated STD’s Faulty operation of epididymis, vas deferens, or urethra
Concerns Testicular Cancer 1% of all cancer 15-34 years of age
Concerns Prostate Cancer Prostate gets bigger and blocks the urethra or bladder 2nd most common type of cancer in men