HD 2314 Lecture Notes - Lecture 7: Corpus Spongiosum Penis, Premature Ejaculation, Erectile Tissue
26 Aug 2016
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Boys are typically more comfortable with their genitalia than girls. Becomes erect to better penetrate the vagina and deposit sperm near the os. Avg flaccid: 3-4 inches tip to base at normal temp. Yes, damaged blood vessels & scar tissue builds up. Foreskin is a fold that can cover part or all of the glans; retracts over the corona during an erection. Also occurs during rem, possibly to keep the penis supplied with blood. Arteries of the penis to allow blood to flow into the 3 cylinders. During erection, veins compress to prevent exit of blood. Functions to keep testicles cooler than the body"s temperature to keep sperm viable. Cremaster muscle moves to scrotum closer to or farther from the body. Typically one (usually the left) hangs a bit lower to allow sliding past rather than compression. Sperm develop in the testicles within a system of tiny tubes called seminiferous.
