Male Reproductive

System

· Reproductive Anatomy of the Human Male.· External:

- penis - scrotum

· Internal: - gonads- accessory sex glands and ducts.

Human reproduction involves intricate anatomy and complex behavior

Male Reproductive System

External structure of the penis:

· glans penis

· prepuce (foreskin)

· There is no verifiable health benefit to circumcision.

Circumcision

foreskin glans penis urethral opening

suturesshaft

corona

· The penis is composed of three layers of spongy erectile tissue.· During sexual arousal the erectile tissue fills

with blood from arteries.· The resultant increased pressure seals off the

veins that drain the penis.

· The engorgement of the penis with blood causes an erection.

· Testes are the male gonads.· seminiferous tubules- form sperm

· Testes are located in the scrotum, outside the body cavity.· This keeps testicular temperature cooler

than the body cavity.· The testes develop in the body cavity and

descend into the scrotum just before birth.

· Sperm Pathway

Semen· Seminal fluid is thick, yellowish, and

alkaline.· It contains mucus, fructose, a coagulating

enzyme.

· Accessory glands:

1.seminal vesicle

2.prostate gland

Seminal Vesicle

Seminal vesicle:• A pair of glands that secrete a liquid

component of semen into the vas deferens. • Secretion is alkaline• Contains fructose,, coagulating enzyme,

Prostate gland:• Location- surrounds and opens into the urethra where it

leaves the bladder. • Secretion- slightly alkaline fluid that activates the sperm

and prevents them from sticking together· Prostate problems are common in males over 40.· Prostate cancer is one of the most common cancers

in men.

Prostate

· Ejaculation propels sperm from the epididymis to the vas deferens.· The vas deferens run from the scrotum and

behind the urinary bladder.

· Here each vas deferens joins with a duct from the seminal vesicle to form an ejaculatory duct.

· The ejaculatory ducts open into the urethra.· The urethra drains both the excretory and

reproductive systems.

Ejaculation

Female Reproductive System

cervix

vagina

Fallopian tube

ovary

uterus

bladder

urethra

clitoris

Female Reproductive System

Internal reproductive:

• Vagina• Cervix• Fallopian tube

(oviducts)• Ovary• Uterus

cervixvagina

Fallopian tube

ovary

uterus

Vagina:• Where the sperm from the male is deposited.• Connects the inner reproductive organs to the

outside of the body.• Where a baby exits the mother body.

• During this time the vagina is often called the birth canal.

Ovary:• A pair of organs that produce the female

reproductive cells (ova)

Fallopian Tubes:• Thin tubes that connect the ovaries to the

uterus.• Where the sperm and ova meet during

reproduction.

Fimbrae & Fallopian Tube

Uterus:• Where a fetus develops if an ova is

successfully fertilized. • Lining of the uterus changes throughout the

menstrual cycle.• The lining thickens in preparation for a

fertilized ova.• If no ova is fertilized then the lining is shed

during menstruation (the period)

Cervix:• Like the gateway between the interior and

exterior reproductive organs.• The cervix allows some sperm to enter the

uterus but expels many more.• During birth the cervix expands to allow the

baby to leave the mother body.

The Uterine Cycle