Male Reproductive System - PowerPoint Presentation

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Male Reproductive System

EQ: Identify the organs (internal & external) of the male repro system.

Also, list concerns to the male repro system.

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External Male Organs

Scrotum

Testes

Penis

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Scrotum

Pouch of skin that encloses the testes (protection).

It hangs down from the body in order to keep the testicles slightly cooler than the rest of the body.

The testes need this slightly decreased temperature in order to make sperm.

3° cooler than the body temperature

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Testes

Primary reproductive organ of the male (Gonads)

Function:

1. Produce spermatozoa (sperm) from puberty till death.

2. Produce the male hormones testosterone and androgens.

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What if a boy has only one testicle?

Occasionally a male will be born with only one testis. Or, a boy may have a testis surgically removed due to disease, injury or an accident that crushed the testicle. The reproductive system can still work normally because the remaining testicle can produce enough sperm

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Testes

Epididymis

: Highly coiled tubule located on top of each testis,

- place where the sperm fully mature

& learn how to swim

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Testes

B.

Sperm:

contains ½ of the instructions needed for the development of a new human being.

Mature: 0.06 millimeters long

Head: Nucleus, consists of 23 chromosomes

Body

Tail: Propels the sperm cell through fluid.

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Puberty

Produce sperm

Growth Spurt

Shoulders Widen

Muscles

Voice deepens

Lengthening and widening of the penis & enlargement of the testes

Hair growth (under arms, genitals & face

Unexpected emotions

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Penis

Deposits sperm inside the female body.

Made of erectile tissue sounded by connective tissue

Erection:

Arteries enlarge

allowing more blood to flow into the penis.

At the same time,

some of the veins in the penis close or narrow so that less blood flows out.

Accumulated blood causes the penis to become large, longer, firmer and to point upward.

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Penis

Ejaculation:

Process by which semen leaves the males body.

Muscles around the urethra and base of the penis contract.

The contraction moves the sperm out of the body.

When a male ejaculates, he is said to have an orgasm.

Volume: 2-6 milliliters

120 million/milliliter

Orgasm: Pleasurable sense of physiological and psychological release.

Female: Rhythmic contractions that help transport sperm cells through the female reproductive tract for fertilization.

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Penis

Circumcision:

Operation in which the foreskin (fold of skin) is cut from around the tip of the penis in order to decrease irritation.

Usually done when a male is 8-10 days old.

Circumcised or not the penis function in exactly the same way.

Uncircumcised: the male should pull the foreskin back when they wash.

Cleaning prevents the buildup of a secretion that can cause irritation and odor.

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Internal Male Reproductive Organs

Vas Deferens

Seminal Vesicles

Prostate

Cowper's Gland

Urethra

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Vas Deferens

Tube that leads from the epididymis to the urethra;

45 centimeters long

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Seminal Vesicles

Saclike structure attached to the vas deferens.

Secretes fluids

This fluid contains nutrients that are sugary to provide energy to the sperm cells

Secretion is added to sperm cells during emission

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Prostate

Gland that secrete a thin, milky fluid,

enhances the ability to move sperm cells.

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Cowper’s Gland

Bulbourethral Glands

Secretes a fluid that lubricates the penis in preparation for sexual intercourse.

Release small amounts of fluid prior to ejaculation.

Contains some sperm. Withdrawal prior to ejaculation is not a reliable method of birth control.

Semen:

Sperm cells and the secretion of fluids from the Seminal Vesicles, Prostrate Gland and Cowper’s Gland.

Volume of semen released is about 2-6 milliliters

Average amount of sperm is about 120 million per milliliter

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Urethra

Tube in which both the urine and semen leave the body.

6 inches long

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Male Reproductive System

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Concerns about the male reproductive system

Nocturnal Emissions

Inguinal Hernia

Sterility

Testicular Cancer

Prostate Cancer

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Nocturnal Emissions

Ejaculation while a male is sleeping.

More common in teenagers due to the level of testosterone increasing and decreasing unpredictably.

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Inguinal Hernia

Sometimes part of an intestine push into the scrotum through a weakness in the abdominal wall

Can be painful and usually require surgery to correct.

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Sterility (infertility)

Unable to reproduce

Men; too few sperm or has sperm that are unable to fertilize an egg.

Cause: Exposure to harmful drugs, x rays, Testicular mumps (disease), or genetic disorders

.

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Testicular Cancer

Cancer of the testes

Most common in males between the ages of 15-35.

Detected early can be treated

Monthly examination of their testes.

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How to Do a Testicular

Self-Examination

1. The best time to do the examination is after a warm bath or shower, when the scrotum is relaxed.

2.

Stand in front if a mirror and look for any swelling of the scrotum.

3.

Check for any lumps, enlargements. Tenderness, or changes in texture by rolling each testicle gently between your thumb and fingers.

4. If you notice any abnormalities, report them to your doctor. In order to detect abnormalities as soon as possible, self-examinations should be performed monthly.

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Prostate Cancer

Prostate enlarges

Risk factors include fatty diet or having an vasectomy

The enlargement may be benign (harmless) or cancerous.

CAUSES PAINFUL URINATION!!!!

NEARLY 100% treatable if detected early.

Older men are more likely to get cancer of the prostate gland.

Most common cancer in American males, as well as the second most common cause of deaths due to cancer in American males.

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