HUMAN REPRODUCTIVE SYSTEM

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Human
Reproduction
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HUMAN REPRODUCTIVE SYSTEM

• HUMAN HAS TWO SEXES, MALE AND FEMALE
• THE GAMETES ARE PRODUCED IN GONADS.
• MALE GONAD IS CALLED TESTES
• FEMALE GONAD IS CALLED OVARY

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Sexual Reproduction in Human
testis
ovary
meiosis
meiosis
sperms
eggs (ova)
fertilization
zygote
embryo
foetus
baby
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MALE REPRODUCTIVE SYSTEM

• The male reproductive system includes
• A pair of testes
• Epididymis
• Vas deferens
• Urethra

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Male Reproductive System
vas deferens (sperm duct)
epididymis
testis
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ACCESSORY ORGANS

• These organs produce secretions that assist the
  movement of sperm
• Seminal vesicle
• Cowpers gland
• Prostate gland

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TESTES

• Testes are male gonads of human.
• They are found within a pouch of skin known as
  the scrotum.
• Each testis contains seminiferous tubules,
  epididymis and vasdeferans

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Testis and epididymis
epididymis
vas deferens (sperm duct)
sperm tubules
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SEMINIFEROUS TUBULES

• Each testes consists of small coiled tubes which
  are called seminiferous tubules.
• Immature sperms are produced in seminiferous
  tubules by meiotic cell division.

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EPIDIDYMIS

• After formation of sperms in seminiferous tubules
  sperms pass to epididymis.
• Epididymis is a storage area of testis.
• Immature sperms remain in the epididymis until
  they are mature.
• After maturation they leave from the epididymis
  through the vas deferens .

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Functions of Seminal Fluid

• To provide a medium for the sperms to swim
• To activate and nourish the sperms
• To neutralize the acidity in the female
  reproductive tract

Seminal Fluid
Semen
Sperms

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URETHRA

• Urethra is a passageway for the elimination of
  urine.
• As sperm enter the urethra, the seminal vesicle,
  Cowpers glands, and prostate gland all secrete
  fluids into the urethra.
• The mixture of these fluids and the sperm are
  called semen.

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Male Reproductive System
seminal vesicle
secrete seminal fluid
prostate gland
Cowpers gland
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SECONDARY SEX CHARACTERS IN MALE

• Testes secretes testosterone. hormone.
• Testosterone initiates secondary sexual
  characters in males.

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SECONDARY SEXUAL CHARACTERS IN MALE

• Growth of hair on the body.
• The change in tone of the voice.
• Expression of male sexual behavior
• Development of prostate gland and seminiferous
  tubules.

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FEMALE REPRODUCTIVE SYSTEM

• Female reproductive system includes
• Ovary
• Fallopian tube(Oviduct)
• Uterus
• Vajina

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Female Reproductive System
oviduct
ovary
uterus
cervix
vagina
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OVARY

• Ovary is female gonads
• Females have two ovaries.Each ovaries contains
  about 200.000 egg.
• They produce eggs and also secrete female sex
  hormone estrogen

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OVULATION

• When an egg matures,the follicle surrounding it
  ruptures,or bursts, and the egg is released at
  the surface of the ovary.This process is called
  OVULATION.

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FALLOPIAN TUBE

• Oviduct or fallopian tube is located near the
  ovary but not connected to it. Egg is moved by
  ciliated cells which are found in lining the
  fallopian tube.

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FERTILIZATION

• If sperm are present in the oviduct, the egg may
  be fertilized. If egg is fertilized by sperm to
  form zygote.
• Zygote completes its development in the uterus.

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SECONDARY SEXUAL CHARACTERS IN FEMALE

• Ovaries secretes estrogen hormone.
• Estrogen initiates secondary sexual characters in
  females.

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SECONDARY SEXUAL CHARACTERS IN FEMALE

• Development of the gonads
• Widening of pelvis
• Formation of breasts