Reproduction

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Human
Reproduction
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Sexual Reproduction
testis
ovary
meiosis
meiosis
sperms
eggs (ova)
fertilization
zygote
embryo
fetus
baby
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Male Reproductive System
What is a vasectomy?
vas deferens (sperm duct)
epididymis
testis
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Testes

• For production of male gametes (sperms)
• For production of male sex hormones

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Epididymis

• For temporarily storage of sperms
• During copulation, muscles of epididymis contract
  to release sperms

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Testis and epididymis
epididymis
vas deferens (sperm duct)
sperm tubules
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Male Reproductive System
seminal vesicle
secrete seminal fluid
prostate gland
Cowpers gland
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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
Sperm

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Male Reproductive System
urethra
penis
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Female Reproductive System
oviduct
ovary
uterus
cervix
vagina
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Functions of Ovary

• For production of female gametes (ova/eggs) and
  production of female sex hormones

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Oviduct

• Carries the ovum forward by
• the beating action of the cilia on its inner
  surface
• the contraction of muscles of oviduct

Cick here
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Menstrual Cycle

• Once in about 28 days
• The uterine lining becomes thickened 14 days
  after ovulation to prepare for the fertilized
  ovum to implant in it

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Menstrual Cycle
Video on change in uterine lining

• Day 1 - 5
• Menstruation starts
• Uterine lining decreases in thickness to a minimum

• Day 6 - 14
• Lining becomes thicker with increased blood
  supply
• Day 14 ovulation

• Day 14 - 28
• Lining remains thick to ready for implantation of
  fertilized ovum

• Day 28
• No implantation of fertilization ovum
• Uterine lining breaks down menstruation starts

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Hormones

• Hormone Male Female
• GnRH FSH/LH release from
  Ant. Pit
• FSH Spermatogenesis
  Follicle growth
• LH Testosterone Secretion
  Follicle release estrogen
• Estrogen
  2nd sex characteristics
• 
  Long Bone growth
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  General anabolic effects
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  Female sex drive
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  Skin Hydration- Increase HDL

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Hormones

• Progesterone prepares uterus for pregnancy
• Testosterone suppress LH and GnRH
• male 2nd
  characteristics
• Stimulate growth
  spurt
• increase bone and
  muscle growth
• libido and
  aggressiveness

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Human Chorionic Gonadotropin

• promotes the maintenance of the corpus luteum
  during the beginning of pregnancy
• Progesterone secretion- maintains uterus
• Maybe morning sickness
• Can also be used clinically to induce ovualtion
• Can be found in blood and urine
• Pregnancy test
• Diet Use