BIOL 1412 Lecture Notes - Lecture 17: Tunica Vaginalis, Seminiferous Tubule, Rete Testis
6 Jun 2017
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Produce secretions that support gametes: male reproductive system structures, gonads = testes. Located within the scrotum (skin + ct) Surrounded by 2 tunics: tunica vaginalis. Extends inward to divide testis into lobules. Tubules unite to form rete testis (rete = network) Walls contain: germ cells in various stages of development, sertoli cells (sustentocytes) Have tight junctions - form blood-testis barrier. Protects sperm from immune system, toxins, drugs etc. Respond to follicle-stimulating hormone (fsh: leydig cells (interstitial cells) Sperm from seminiferous tubules into rete testis. Sperm mature (develop ability to swim: vas (ductus) deferens. Vasectomy = vas deferens cut & tied off. Spermatic cord - contains vas deferens, nerves (ans) veins, artery, lymph vessels, muscle (skeletal: ejaculatory duct. Formed by union of vas deferens and duct from seminal vesicle: urethra. 3 regions: prostatic - through prostate, membranous - through urogenital diaphragm iii)) penile (spongy) - through corpus spongiosum of penis. Opens on the glans penis: penis.
