Human Reproductive System

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Human Reproductive System
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Male Reproductive System
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Sperm Formation

• MEIOSIS
• Form in testes
• Temperature important!
• Scrotum
• Leave testes via epididymus to the vas deferens

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Semen

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

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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

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Female Reproductive System
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Ovum Formation

• MEIOSIS
• Ova are formed before birth
• 1 ovum per month is matured and released from
  ovaries

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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

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Fertilization

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

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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

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1st Trimester

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

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2nd Trimester

• Mostly growth
• Looks more like a baby
• Some preemies survive at this stage

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3rd Trimester

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

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Birth

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

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Most of this not fun?