Human Reproduction

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Human Reproduction
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Human Reproduction

• Both sexes have
• gonads (organs that produce gametes)
• Ducts to store and deliver gametes
• Structures to facilitate copulation

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Female Reproductive Anatomy
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• Ovaries site of gamete production
• Follicles each consists of a single developing
  egg cell surrounded by tissue to nourish it
• Ovulation egg cell is ejected from the follicle
• Corpus luteum remaining follicular tissue after
  ovulation
• Oviduct (fallopian tube) where cilia sweep the
  egg toward the uterus fertilization may take
  place here where an ectopic pregnancy occurs

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Female Reproductive Anatomy
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• Uterus actual site of pregnancy grows to
  accommodate the developing fetus
• Endometrium blood-rich layer of tissue that
  lines the uterus where an embryo would implant
  and develop in normal pregnancy
• Embryo from zygote to about 9 weeks
• Fetus from 9 weeks to birth

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Female Reproductive Anatomy
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• Cervix narrow neck at the bottom of the uterus
• Vagina birth canal where sperm are deposited
• Vulva outer structures of the female anatomy
• Urethra tube through which urine is excreted
• Labia minora skin folds that border the opening
  to vagina
• Labia majora fatty skin folds that protect the
  genital region
• Hymen thin membrane that partially covers the
  vaginal opening
• Clitoris short shaft supporting a rounded glans
  very sensitive due to numerous nerve endings

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Male Reproductive Anatomy
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• Penis (contains erectile tissue that can fill
  with blood and cause an erection during sexual
  arousal) shaft that supports a glans (very
  sensitive due to numerous nerve endings)
• Testes male gonads located outside the body in
  the scrotum
• Scrotum sac that holds testes away from the
  body (lower temperature) for proper development
  and function of sperm.
• Epididymis store sperm while they finish
  development
• Ejaculation expulsion of sperm containing fluid
  from the penis.

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Male Reproductive Anatomy
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• Pathway of sperm during Ejaculation
• Leave epididymis
• Vas deferens duct
• Seminal vesicles and prostate gland add
  nourishing fluid to sperm and provides protection
  from acidic vagina
• Empties into urethra (carries both semen and
  urine out of the penis)
• Semen about 5 mL, 95 fluid from glands and 5
  sperm cells