BPK 325 Chapter Notes - Chapter 12: Spermatic Cord, Peritoneum, Ejaculation
16 Aug 2020
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Sperm carries the 23 chromosomes to female gamete for fertilization. A skin-covering that contains muscular tissue and covers/protects/regulates temperature of testes. Dartos muscle = deep just to skin, extends internally to make scrotal septum (separates testes into 2) Cremaster muscle = extends down from internal oblique muscle, envelopes each testis. When dartos and cremaster muscle contract, scrotum envelopes testes and brings them closer to the body. Occurs when external temperature is cold, is mechanism to reduce sa in order to retain heat (vice versa when hot) Specialized to produce sperm and androgens (eg. testosterone) Connective tissues help organize and promote structure. Superficial layer = tunica vaginalis (serous membrane) Deep to tv = tunica albuginea (tough, white layer, dense ct) Creates septa in testis compartmentalizes testis into numerous lobules. In each lobule = highly coiled tubes seminiferous tubules (sperm are produced and matured, androgen-secreting cells can be found) Developing spermatogonia matures as they move towards the.
