HDFS 240 Lecture Notes - Lecture 4: Vas Deferens, Ejaculatory Duct, Semen
12 Feb 2018
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Document Summary
Male sexual organs: ability to engorge and thicken for penetration. Contains the urethra: carriers both urine and semen outside the body. No bone and little muscle: attached to muscles that help ejaculate semen. Three cylinders: two lateral corpora cavernosa on outer layers, corpus in center that contains urethra. Glans penis: three parts: corona, frenulum, urethral opening. Surgical procedure to remove foreskin from penis. Penis becomes firm in response to stimulation: anything perceived as sexual. Triggered by parasympathetic nervous system: nerve fibers cause arteries in penis to swell, blood rushes into corpus carernosa and spongiosum. Contains testicles: each in sac separated by thin layer of tissue. Regulates testicle temp: skin contains many sweat glands. Contracts and elevates testicles in response to sexual arousal: protection during sex. Testicles; egg shaped glands that rest in the scrotum: roughly 2 inches long x 1 inch in diameter. Comma-shaped orgasm: sits along the testicle, easily felt if testicle is rolled between fingers.
