The human body in health and illness

Glands Penis

Urethra

Penis

Prostate Gland

Vas Deferens

Bladder

Seminal Vesicle

Ureter

[Type a quote from the document or the summary of an interesting point.

Scrotum

Testes

Anus

Colon

Glands Penis

Urethra

Penis

Prostate Gland

Vas Deferens

Bladder

Seminal Vesicle

Ureter

Forskin

Scrotum

Testes

Anus

Colon

The most important part of the male reproductive system are the Testicles (Gonads)

Sperm• Production• Nourishment • Transportation

The testes evolve from prenatal sex cells called Gonads

The Gonads begin their development within the abdominal cavity and usually descend into the scrotum during the last 2 months of fetal development.

Failure to descend is called cryptorchidism • A condition that could

result in sterility

The two major functions of the testes• Production of Sperm• Secretion of

Testosterone

Testes located outside the body and are suspended in a sac called the scrotum

THE SCROTUM is pouch like structure that houses the testes and regulates temperature.

This is done in two ways:

1) Sweating 2) Cremasteric

Muscle

Sperm cannot live at body temperature (98.6)

Sperm prefers the temperature of the scrotum (93.2)

Cold environment: the scrotum with the assistance of the cremasteric muscle contracts the testes closer to the body maintaining 93.2 degrees

Warm environment: Cremasteric muscle relaxes allowing the testes farther from the body maintaining 93.2 degrees

Tight underwear or jeans can elevate the temperature of the testes thereby lowering the sperm count

The testes are seperated and divided into Lobules

Lobules are made up of:• Seminiferous Tubules• Epididymis.

Seminiferous tubules, which is where the actual production of sperm takes place.

After spermatogenesis the sperm pass into the epididymis for collection and storage

While in the epididymis the sperm become fertile and develop the ability to move

The walls of the epididymis contract forcing sperm into the vas deferens

A continuation of the epididymis which travels through the abdominal cavity and connects with the duct of the seminal vesicle

Vasectomy• A cutting of the Vas

Deferens causing infertility

Extends from the base of the bladder to the tip of the penis

Carries urine from the bladder to the outside

Carries semen from Seminal Vesicle to the outside

During sexual arousal the gland produces a clear, viscous secretion known as pre-ejaculate.

This fluid helps to lubricate the urethra for sperm to pass through.

It also neutralizing traces of acidic urine in the urethra,and helps flush out any residual urine or foreign matter.

Located at the base of the bladder Secretes a thick yellowish material

rich in sugar and vitamin C to activate and nourish the sperm

The penis is the male sex organ for intercourse and also serves as a urine draining organ.

The reproductive system is controlled by the pituitary gland (Master Gland)

In the male, the pituitary gland secretes two main hormones: • FSH: FOLLICLE

STIMULATING HORMONE

• ICSH:INTERSTITIAL CELL STIMULATING HORMONE

Stimulates the testes to produce sperm cells

Stimulates testes to produce the primary sex hormone, testosterone

Testosterone is the male primary sex hormone.

It is responsible for the male secondary sexual characteristics• Voice Change• Masculine Features• Muscle Development• Hair Growth• Attracted to the

opposite sex