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Human%20Reproductive%20System%20Review

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Human Reproductive System Review Male Reproductive System Sperm Formation Sperm is the male gamete; sex cell Sperm forms in testes Scrotum keeps cooler than rest of ... – PowerPoint PPT presentation

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Title: Human%20Reproductive%20System%20Review


1
Human Reproductive System Review
2
Male Reproductive System
3
Sperm Formation
  • Sperm is the male gamete sex cell
  • Sperm forms in testes
  • Scrotum keeps cooler than rest of the body for
    sperm production it lowers the testes (gonads)
    from the body.
  • Semen is sperm plus protecting fluids from the
    Cowpers Gland and Seminal Vesicles.
  • Semen leaves testes through the Vas Deferens
    (sperm ducts) to the urethra before it exits.

4
Secondary Sexual Characteristics - Male
  • These are side effects after puberty
  • Produced by testosterone
  • Deeper voice
  • Chest and facial hair
  • Lengthen bones
  • Increased size of testes for sperm production

5
Female Reproductive System
6
Ovum Formation
  • The Ova are the female gametes
  • Eggs are formed before birth.
  • 1 egg per month is matured and released from
    ovaries, most of the time
  • Eggs travel through the fallopian tube where they
    may become fertilized

7
Secondary Sexual Characteristics - Female
  • Induced by increased Latinizing Hormone (LH),
    Follicle Stimulating Hormone (FSH), Estrogen, and
    Progesterone hormone levels.
  • Pubic hair
  • Widen pelvis
  • Enlarge mammary tissue (breasts)
  • Begin menstrual cycles

Menstrual Cycle Diagram
8
Fertilization
  • Occurs in upper 1/3 of Fallopian tube
  • Only 1 sperm can fertilize an egg.
  • Fertilized egg zygote
  • An average woman is pregnant (gestational period)
    for 9 whole months.
  • That is 40 weeks. Babies can survive if they
    are born earlier, but they may have
    complications due to being premature.

9
Implantation
  • Fertilized eggs are implanted into thick walls of
    uterus
  • Chorion membranes dig into uterus to form
    placenta
  • Zygote grows into an embryo
  • Embryo gets air and nutrients through the
    umbilical cord
  • Once pregnant, progesterone levels stay high in
    mom
  • Moms uterus grows with the baby

10
1st Trimester 1st 12 weeks
  • Heart develops first
  • Neural tube develops
  • All body systems appear by Week 8 Now a Fetus

11
2nd Trimester up to 24 weeks
  • Most growth
  • Looks more like a baby
  • Some preemies survive at this stage

12
3rd Trimester Up to 40 weeks
  • More growth
  • Kicking, rolling, stretching
  • Eyes open Week 32
  • Lungs mature
  • Rotates to head-down
  • position, unless baby is breech

13
Birth
  • Labor
  • Uterine contractions begin
  • Cervix dilates to 10 cm.
  • Birth
  • Uterus pushes baby through vaginal canal
  • Placenta delivered after baby
  • Cesarean Section (c-section) is a surgery that
    cuts through the uterus to deliver the baby if it
    cannot be born vaginally
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