PSY 085 Study Guide - Midterm Guide: Corpus Spongiosum Penis, Cremaster Muscle, Foreskin
27 Aug 2016
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Penis- pretty simple, avg length- 5-7 inches erect, 1-3 inches flaccid. Shaft- the body of the penis, the part that elongates during erection. Glans- the tips, really sensitive, like clitoris, but less sensitive. Urethral opening- pee and semen come out here. Removal of the foreskin (circumcision) can decrease the risk of hiv, utis, hpv in a partner. Frenulum- connection between foreskin and glans, on the bottom of the penis, really sensitive. Urethra runs through it, surrounded by corpus spongiosum- forms the glans too. Corpus cavernosum- fills with blood during stimulation, puts the bone in boner. Crura- muscles at the base of the penis, women have it too, erectile tissue. Scrotum- it"s the fleshy, wrinkly sack that encases the testicles, made from the same tissue as labia majora. Cremaster muscle- raises and lowers the testicle w/in scrotum, responds to temperature and sexual stimulation. Dartos muscle- also responds to temperature, contacts or relaxes scrotum.
