AN SC 431W Lecture Notes - Lecture 8: Leptin, Vas Deferens, Anterior Pituitary
Document Summary
Embryogenesis: testes decent growth and regression, gubernaculum: holds testis in place as body grows. Pulling through peritoneum: regresses through inguinal canal and into scrotum, cryptorchid: hidden gonad. Can occur in humans, pigs, and dogs: male development, first/key thing that triggers male development: expression of sry gene and protein on y chromosome, primordia germ cells are precursors to gametes. Chemotaxis: chemical gradient: cells move and know where they are going. Go to gonadal ridge and turn into germ cell: kidney becomes functional at birth: mesonephros, epididymis and vas deferens (ductus deferens) Mesonephros ducts (wolffian ducts: genetic sex determined at fertilization. Phenotypic sex determined during embryo development: neurohypophysis, rathke"s pouch. Develop into anterior pituitary mouth: muscular, skeletal, cardiovascular, internal reproductive system: develop from mesoderm germ layer, totipotent= cell can become anything. Need fatness for reproduction cycles, body maturation directs more energy to reproduction: exposure to social/environmental cues.
