BIOL 3070 Lecture Notes - Lecture 31: Seminiferous Tubule, Seminal Vesicle, Spermatogenesis
Document Summary
Male reproductive system: the testicular structures, organization, copulatory organs and hormonal regulation are different between mammals and insects, basic components are similar however: testis, vas deferns, ejaculatory duct, penis, accessory gland. Have a pair of each chromosome, that is 2 from dad and 2 from mom) (n to 2n: each primary spermatocytes meiosis forms 2 secondary spermatocytes (haploid, Cytoplasm and non essential organelles are lost, leaves small abundant mitochondria (important for production of atp in the sperm usually changing of fructose from the fluid of accessory cells) Mature spermatozoa are stored in epididymis: sertoli cells: Found from the basement membrane of the seminiferous tubules. Maintaining the blood testis barrier: it is different than the normal blood, maintained by the tight junctions between the sertoli cells. Secrete androgen binding protein which concentrates testosterone into a high concentration (which is important for spermatogenesis: leydig cells: Secretes inhibin negative feedback to the pituitary gland to maintain balance in the production.
