Anatomy and Cell Biology 3309 Study Guide - Final Guide: Efferent Ducts, Simple Columnar Epithelium, Mediastinum Testis
28 May 2014
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Male reproductive system (1) (2) (3) tunica vaginalis - mesothelial cells tunica albuginea - dense c. t. and smooth muscle - help to move sperm tunica vasculosa - network of blood vessels. Tunica albuginea forms mediastinum testis at the posterior pole - region of entrance and exit. Radial septa from the mediastinum form 250 lobules which contain the seminiferous tubules. Each testis contains about 800 highly convoluted seminiferous tubules, 1-4 in each lobule. Each tubule is 30 to 100 cm long and about 200 m in diameter. They are lined by germinal (seminiferous) epithelium. They are surrounded by c. t. and contractile myoid cells (boundary or peritubular tissue) Cells at the periphery of the tubule rest on a basement membrane. They have a central, pale nucleus and a prominent nucleolus which aids in identification. They have abundant smooth e. r. and lysosomes. Spermatogenic cells: located within the seminiferous epithelium amongst sertoli cells(4-8 cells deep)
