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Human Reproductive System

Human Reproductive System. Male Reproductive System. Sperm Formation. MEIOSIS Form in testes Temperature important! Scrotum Leave testes via epididymus to the vas deferens. Semen. Fluids help to transport, feed, and protect sperm Seminal vesicles Prostate gland Bulbourethral glands.

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Human Reproductive System

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  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. Most of this not fun?

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