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23 Cards in this Set
- Front
- Back
Male Reproductive System |
Reproductive anatomy Transport of sperm Spermatogenesis Hormonal control of reproduction Surgical birth control Common cancers |
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Testes |
Site of sperm and testosterone production. |
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Epididymis |
Holds and matures sperm. |
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Vas deferens |
Transports sperm to urethra. |
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Scrotum |
Regulates temperature for optimum sperm production. (Slightly cooler than body temp.) |
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Seminal vesicals/ prostate/ cowper's (bulbourethral) |
Glands that create semen. |
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Prostate muscle |
Forces semen and sperm out during ejaculation. |
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Ejactory duct |
Regulates when sperm and semen enter the urethra. |
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Urethra |
Transports sperm or urine out of the body. |
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Penis and erectile tissue |
Ensure proper position for depositing sperm. |
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Semen |
Transports sperm to female. Nourishes sperm. Protects sperm. Produces 95% of the ejaculated volume. |
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Sperm secreting glands |
Seminal vesicals(4): drain into ejaculatory duct. Prostate gland: ejactory duct join urethra, secretes fluid into urethra. Bulbourethral gland (cowper's): drains into urethra at the base of the prostate. |
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Nutrients : Glands |
Seminal vesicle: fructose (energy), prostaglandins (muscle contractions in females). Prostate gland: alkaline buffer (buffers acid in vagina). Bulbourethral gland (cowper's): mucus (pre-ejaculate, cleans urethra, aids movement) |
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Spermatogenesis: creation of sperm |
Occurs in testes: seminiferous tubules Reductional division Why males can produce for their lifetime |
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Seminiferous tubules |
Sertoli cells - respond to FSH -start sperm production, and nourish developing sperm |
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Why males can produce for their lifetime. |
Spermatogonia: - stem cells that are precursors of sperm -divide by mitosis to produce more spermatogonia - or differentiate into spermatocytes through meiosis |
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Reductional division |
Spermatocytes: divide by meiosis to produce 4 haploid spermatids. Spermatids: differentiate into sperm, losing most of their cytoplasm. |
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Sperm structure |
Head: acrosome -enzymes allow penetration of ova, Nucleus -DNA, essential for neworganism Middle Piece: lots of mitochondria Tail: flagellum rotates like corkscrew |
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Interstitial space |
Leydig cells -respond to LH -start testosterone production in blood |
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Hormonal control |
Negative feed back does not stop hormone production only levels out production of hormones |
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Testosterone -secondary sex traits |
Hair distribution growth of larynx bone growth protein synthesis male pattern baldness sex drive aggressive behavior |
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Vasectomy |
Cutting the vas deferens tubes and sealing them with stitches or heat. Done under local anaesthesia Surgical birth control |
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Common Cancers |
Testicular -detect with self examination, occurs early in age Prostate gland -detect at doctors office, occurs later in age, physical exam and blood test (PSA) Prostate specific antigen |