1. The Reproductive System
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The Reproductive System
The Reproductive System
We truly are “fearfully and wonderfully made.” Almost any one of the body’s structures or functions might have inspired this statement, but of them all, perhaps the reproductive systems best deserves such praise. The achievement is the miracle of reproducing the human body; the goal is the survival of the human species.

2. The Reproductive System
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The Reproductive System
The Reproductive System
The male reproductive system consists of one group of organs and the female reproductive system consists of another group.
These two systems differ in structure, but they share a common function – that of reproducing the human body.

3. The Reproductive System
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The Reproductive System
The Reproductive System
The male reproductive system consists of one group of organs and the female reproductive system consists of another group.
These two systems differ in structure, but they share a common function – that of reproducing the human body.

4. The Reproductive System
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The Reproductive System
The Reproductive System
Germ cells (gametes) – the specialized sex cells required for reproduction.
In the male – spermatozoa, or sperm.
In the female – an ovum, or egg.
Contains two type of organs:
Primary (gonads) – 2 testes in the male and 2 ovaries in the female.
Produce germ cells
Make hormones
Accessory organs – glands and ducts.
Seems like other cells should have 46, not 23.

5. The Reproductive System
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The Reproductive System
The Reproductive System
Accessory Organs of the Male
Ducts
Epididymis (2)
Vas deferens (2) or Ductus deferens
Ejaculatory duct (2)
Urethra
Supportive Sex Glands
Seminal vesicle (2)
Bulbourethral or Cowper’s Glands (2)
Prostate Gland
External Genitals
Scrotum
Penis
Seems like other cells should have 46, not 23.

6. Male Reproductive System
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The Reproductive System
Male Reproductive System

7. The Reproductive System
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The Reproductive System
The Reproductive System
Accessory Organs of the Female
Ducts
Fallopian Tubes (2)
Uterus
Vagina
Accessory Sex Glands
Bartholin’s Glands
Breasts
External Genitals
Vulva
Seems like other cells should have 46, not 23.

8. Female Reproductive System
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The Reproductive System
Female Reproductive System

9. Male Reproductive System
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The Reproductive System
Male Reproductive System
External Genitalia
Penis
Scrotum

10. Male Reproductive System
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The Reproductive System
Male Reproductive System
External Genitalia
Penis – male organ of sexual intercourse
Corpus Spongiosum
Corpus Carvenosum
Sexual Stimulation
Under the stimulus of sexual emotion, blood floods the spaces in the erectile tissue of the corpora, distending them enough to produce erection of the penis. The climax is characterized by the ejaculation of semen from the penis.

11. Male Reproductive System (cont.)
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The Reproductive System
Male Reproductive System (cont.)

12. Male Reproductive System
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The Reproductive System
Male Reproductive System
External Genitalia
Scrotum
Contains:
Testis
Sperm production
Production of testosterone
Epididymis
Lower part of the Vas Deferens
Beginning of the Spermatic Cord

13. 6.13
The Reproductive System
Scrotal Sac

14. 6.13 Sperm Motility The Reproductive System
Sperm cells are contained in seminiferous tubules.
At the top part of each testis is the epididymis.
Sperm develop to maturity and become able to move.
Enter a narrow tube called the vas deferens.
Travel to the seminal vesicles.
Secrete fluid to help the sperm move.
Pass through the ejaculatory duct leading to the prostate gland and the urethra.
The prostate gland secretes a fluid that helps the sperm move and contracts its muscle tissue to help ejaculate the sperm.

15. 6.13 Sperm Motility The Reproductive System
Below the prostate are the two bulbourethral glands, or Cowper's glands - secretes a fluid that lubricates the inside of the urethra.
The urethra passes through the penis (end of the penis – glans penis) to the outside of the body.

16. 6.13 Fertilization The Reproductive System
The spermatozoon is a microscopic cell, much smaller than an ovum. It has a tail that propels the sperm forward. During ejaculation, hundreds of millions of sperm are released.
Usually only one sperm can fertilize a single ovum. In some cases, two or more ova are fertilized at a single time, resulting in multiple births. Identical twins are the result of the splitting of one ovum after a single sperm has fertilized it. Fraternal twins are the result of two sperm fertilizing two ova.

17. Female Reproductive System
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The Reproductive System
Female Reproductive System
The ovaries release an egg as part of the ovarian cycle.
A fertilized egg is transported via one of the fallopian tubes to the uterus
Develops into an embryo and then into a fetus.
The baby is born through the vagina or surgically through the abdomen in a Caesarean delivery.

18. Female Reproductive System
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The Reproductive System
Female Reproductive System
The ovaries release an egg as part of the ovarian cycle.
A fertilized egg is transported via one of the fallopian tubes to the uterus
Develops into an embryo and then into a fetus.
The baby is born through the vagina or surgically through the abdomen in a Caesarean delivery.

19. Female Reproductive System
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The Reproductive System
Female Reproductive System
The ovaries
Lie on either side of the uterus
Within the pelvic cavity
Release one mature ovum during each monthly cycle - ovulation.

20. Female Reproductive System (cont.)
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The Reproductive System
Female Reproductive System (cont.)

21. Female Reproductive System (cont.)
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The Reproductive System
Female Reproductive System (cont.)

22. Female Reproductive System (cont.)
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The Reproductive System
Female Reproductive System (cont.)
The Female Reproductive System (cont.)
Estrogen and progesterone.
Other hormones, which help in childbirth and milk production.

23. 6.13
The Reproductive System
What are germ cells?

24. 6.13 What are germ cells? Specialized sex cells
The Reproductive System
What are germ cells?
Specialized sex cells