BIOM 3200 Lecture Notes - Lecture 7: Male Accessory Gland, Corpus Luteum, Labia Majora
17 Oct 2017
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Document Summary
Mammalian ovum/oocyte: oocyte consists of surrounding follicle cells, zona pellucida, a plasma membrane & cortical granules inside cytoplasm, that have an important role during fertilization. Structure of spermatozoon: sperm is made of a head (containing acrosome), a neck (rich in mitochondria) & tail. Sex determination & sex chromosomes: chromosomes divide in autosomal & sex chromosomes. & only 1 is fully active explains why man congenital disorder involve x-linked genes. Located on short arm of y chromosome called sry gene. In xy embryos, seminiferous tubules form soon after tdf production: contains germinal cells (become sperm) & sertoli cells (supporting cells) differentiate 43-50 days after fertilization. Unit 7: reproduction: leydig cells (those making testosterone) appear ~ day 65 & begin making large amts of androgens ~ 8 weeks after fertilization, stimulating development of the rest of male reproductive organs testosterone is major androgen.
