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Human Reproductive System

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Human Reproductive System Male Reproductive System Sperm Formation MEIOSIS Form in testes Temperature important! Scrotum Leave testes via epididymus to the vas ... – PowerPoint PPT presentation

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Title: Human Reproductive System


1
Human Reproductive System
2
Male Reproductive System
3
Sperm Formation
  • MEIOSIS
  • Form in testes
  • Temperature important!
  • Scrotum
  • Leave testes via epididymus to the vas deferens

4
Semen
  • Fluids help to transport, feed, and protect
    sperm
  • Seminal vesicles
  • Prostate gland
  • Bulbourethral glands

5
Secondary Sexual Characteristics - Male
  • Produced by testosterone
  • Deeper voice
  • Axillary and pubic hair
  • Chest and facial hair
  • Lengthen bones
  • Increased size of testes for sperm production

6
Female Reproductive System
7
Ovum Formation
  • MEIOSIS
  • Ova are formed before birth
  • 1 ovum per month is matured and released from
    ovaries

8
Secondary Sexual Characteristics - Female
  • Induced by increased LH, FSH, estrogen, and
    progesterone hormone levels
  • Axillary and pubic hair
  • Widen pelvis
  • Enlarge mammary tissue
  • Begin menstrual cycles

9
Fertilization
  • Occurs in upper 1/3 of Fallopian tube
  • Once one sperm enters, egg membrane changes
  • Fertilized egg zygote

10
Implantation
  • Implanted into thick walls of uterus
  • Chorion membranes dig into uterus to form
    placenta
  • Embryo supported via umbilical cord
  • Once pregnant, progesterone levels stay high in
    mom

11
1st Trimester
  • Heart develops first
  • Neural tube develops
  • All body systems appear by Week 8 Now a Fetus

12
2nd Trimester
  • Mostly growth
  • Looks more like a baby
  • Some preemies survive at this stage

13
3rd Trimester
  • More growth
  • Kicking, rolling, stretching
  • Eyes open Week 32
  • Lungs mature
  • Rotates to head-down
  • position

14
Birth
  • Labor
  • Uterine contractions begin
  • Cervix dilates to 10 cm.
  • Birth
  • Uterus pushes baby through vaginal canal
  • Placenta delivered after

15
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16
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