KINE 1P90 Lecture Notes - Lecture 20: Seminiferous Tubule, Ejaculatory Duct, Bulbourethral Gland
31 Mar 2016
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Document Summary
Secrete sex hormones: testosterone (male) or estrogen and progesterone (female) A system of ducts that are specialized to transport or house the gametes ater they are produced. In abdomen during development and descend into scrotum during 7th month of gestaion. Accessory glands: secret semen into reproducive tract. Each tesicle is separated from other by a septum (protects against spreading of infecion) Temperature of tesis is carefully regulated by moving them closer/farther away from body. Cremaster muscle: body temp increases, muscle relaxes and testes move further away, contract and pulls towards body in cold environment. Dastos muscle: smooth muscle below skin of scrotum. In cold, contracts and pulls enire scrotum toward body. Seminiferous tubules: 80% of tesicular mass, produce sperm. Leydig cells: in connecive issue between seminiferous tubules, produce testosterone. Secreted into blood where it is transported (bound to plasma protein) to site of acion. Some goes into lumen of seminiferous tubules where helps with sperm producion.
