Reproduction_Teacher2 - Reproductive System This is the...

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1 Reproductive System This is the only system that . . . . need not function to live a full, impacting life.
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2 Outline Male Reproductive System Testes and Sperm Hormonal Regulation Female Reproductive System Genital Tract Hormonal Levels Uterine Cycle Fertilization and Pregnancy Control of Reproduction Infertility
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3 Hormonal Regulation in Males Hypothalamus secretes gonadotropin-releasing hormone ( GnRH ). Stimulates anterior pituitary to secrete: Follicle-stimulating hormone ( FSH ). Promotes sperm production. Luteinizing hormone ( LH ). or Interstitial cell-stimulating hormone ( ICSH ) Controls testosterone production. Testosterone is essential for reproductive organs and male secondary sex characteristics . . . beard, body hair, voice change, muscle strength.
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4 Male Reproductive System Male gonads, testes , are suspended in scrotum . Sperm are produced in testes and mature in epididymis . Travel to vas deferens for storage. Ejaculate from urethra . Semen composed of sperm and secretions form the seminal vesicles, prostate gland, and bulbourethral glands.
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5 Spermatogenesis: Sperm Production in the Testis Seminiferous tubules Spermatids Spermatocytes Spermatozoa Sertoli cells Interstitial tissue Leydig cells Capillaries
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6 Spermatogenesis: Sperm Production in the Testis
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7 Head Acrosome Nucleus Midpiece Centrioles Mitochondria Tail Flagellum Microtubules : Spermatozoa Structure and Functions in Review
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8 Regulation of Spermatogenesis GnRH   - LH - Leydig cells - testosterone - 2 0 sex charactacteristics GnRH - FSH - Sertoli cells - spermatoctye  maturation Inhibin feedback – FSH,  testosterone – short and  long loops
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9 Regulation of Spermatogenesis
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10 Orgasm in Males Penis has a long shaft and an enlarged tip, glans penis. During sexual arousal, autonomic nerve
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Reproduction_Teacher2 - Reproductive System This is the...

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