BIOL-242 Lecture Notes - Lecture 59: Vas Deferens, Ejaculatory Duct, Reproductive System
16 Jun 2020
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Chapter 27 part 1 | male reproductive anatomy. Primary sex organs (gonads) - testes and ovaries. Produce gametes (sex cells ) sperm & ova. Accessory reproductive organs - ducts, glands, and external genitalia. Growth and development of many other organs and tissues. Sperm delivered to exterior through system of ducts. Epididymis ductus deferens ejaculatory duct urethra. Figure 27. 1 reproductive organs of the male, sagittal view. Temperature kept constant by two sets of muscles. Dartos muscle - smooth muscle; wrinkles scrotal skin; pulls scrotum close to body. Cremaster muscles - bands of skeletal muscle that elevate testes. Figure 27. 2 relationships of the testis to the scrotum and spermatic cord. Tunica vaginalis outer layer derived from peritoneum. Septa divide testis into ~250 lobules, each containing 1 4 seminiferous tubules - site of sperm production. Seminiferous tubule is where synthesis of praticoids occur. Spermatogonium becomes a type b daughter cell, which splits.
