reproduction

reproduction - Reproduction 1 Repro Basics 2 Male 3 Female...

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Reproduction 1. Repro Basics 2. Male 3. Female Only system not required for the life of the individual Required for the continued existence of the species
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Cell Division Mitosis- Meiosis-
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Haploid- Diploid- Zygote- Embryo-
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Male Reproductive Functions Produce gametes (sperm) Synthesis of androgens (male sex hormones) such as testosterone
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Reproductive System Components Gonads Ducts Accessory glands Perineal structures
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Male reproductive system Gonads - testes Ducts - Accessory glands Perineal structures scrotum and the penis Epididymis Ductus or Vas Deferens Ejaculatory Duct Urethra bulbourethral glands prostate gland seminal vesicles
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Scrotum and Testes Early development - testes form inside the body near the kidneys Before birth - testes typically descend into the scrotum Scrotum - sac made of a layer of skin and an underlying layer called the superficial fascia Cryptorchidism - Cremaster muscle - skeletal muscle that lie deep to the dermis of the scrotum. Regulation of temperature of the testes (should be about 1ºC cooler than core body temperature for normal sperm development)
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Spermatic cords extend from the abdominopelvic cavity to the testes Contain fascia and muscle that enclose the ductus deferens, blood vessels, lymphatic vessels, and nerves, which lead to and from the testes Inguinal canal - hole in abdominal musculature that links the scrotal cavity to the abdominopelvic cavity inguinal hernia- Excessive force on the abdomen pushing part of the intestine into the inguinal canal
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Microscopic Testicular Structure Interstitial or Leydig cells Produce androgens (Testosterone) Seminiferous Tubules – spermatogenesis occurs here What hormone stimulates this process? What hormone stimulates this process?
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Tunica albuginea - thin layer of tissue surrounding each testes Lobule - each testis is divided into compartments Each lobule contains many seminiferous tubules ; a single testis contains about one- half mile of seminiferous tubules. Passages called the
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This note was uploaded on 02/26/2011 for the course BIO 107 taught by Professor Smith during the Spring '11 term at NE Texas CC.

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reproduction - Reproduction 1 Repro Basics 2 Male 3 Female...

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