The Human Reproductive System

Male Reproductive System

scrotum

testis/testes

epididymis

vas deferens

Cowper’s gland

rectum

seminal vesicles urinary bladder

prostate gland

urethra

penis

Male Reproductive System

1.  Scrotum – sac of skin that holds testes. Hangs below body to keep testes cool.

2.  Testes – Where sperm and the male hormone testosterone is made.

Male Reproductive System 3.  Epididymis – Place where sperm matures and

is stored.

4.  Vas deferens – tube where sperm travels and winds up in the urethra.

5.  Cowper’s gland – produces fluids to nourish sperm

Combination of sperm and fluids - semen

Male Reproductive System 6. Rectum – holds wastes

7. Seminal vesicles – adds secretions to semen.

8. Urinary bladder – stores urine

9. Prostate gland – contributes fluid to semen.

10. Urethra – tube for excretion of urine and sperm.

Male Reproductive System

11. Penis – external organ where semen and urine passes.

Ejaculation – muscular contractions force semen through urethra.

Female Reproductive System ovary

uterus

rectum cervix vagina

urethra

Urinary bladder

oviduct

Female Reproductive System

1.  Ovary – organ that produces eggs and the female hormone estrogen.

Also responsible for menstrual cycle.

2. Oviduct – The tube which the egg passes through from the ovary.

3. Uterus – Organ where the fertilized egg finishes its development (womb).

Female Reproductive System 4. Urinary bladder – storage of urine.

5. Urethra – passage of urine to outside of body

6. Vagina – serves as entry of semen, as birth canal and exit for menstrual fluid.

7. Cervix – narrow opening of uterus

Female Reproductive System 8. Rectum – passage for wastes

Female Eggs 1. All the eggs are present at birth (approximately

2 million).

2. During the woman’s lifetime 500 eggs mature

3. Egg can be fertilized for about 12 - 24 hours after ovulation.

Fun fact: Pregnancy begin when the zygote attaches itself to the uterus and NOT when egg is fertilized.

Ovulation to Implantation

1.  Ovary – produces estrogen & progesterone – meiosis occurs & egg develops

2.  Egg matures in follicle of ovary 3.  Ovulation – egg released from follicle –

may live for 24 hours

Ovulation to Implantation

ovary follicle

egg from ruptured follicle

oviduct

uterus

cervix

vagina sperm

The Menstrual Cycle

A Cycle during which a developed egg is released from the ovary and the uterus is prepared to receive a fertilized egg.

------------------------------------------------------ Menstruation: Loss of egg and uterine tissue

via vagina if fertilization does not occur

Menopause: The time when a woman stops menstruating, usually between 45 & 55 and is no longer able to conceive.

The Menstrual Cycle

Ovulation: Events leading to an egg being released from the ovary.

Menstruation: Loss of egg and uterine tissue via vagina if fertilization does not occur.

Menopause: The time when a woman stops menstruating, usually between 45 & 55 and is no longer able to conceive.