PHSI 208 Lecture Notes - Lecture 60: Smooth Muscle Tissue, Reproductive System, Erectile Tissue
Document Summary
Reproduction is marked by species-specific behaviours designed to ensure that egg and sperm meet. In terrestrial vertebrates, internal fertilization requires interactive behaviours and specialized adaptations of the genitalia: females must have a receptacle for sperm, males must possess an organ to deposit sperm in receptacle. In humans this cannot occur in resting state, male is flaccid: first requires the penis to stiffen and enlarge (erection, sperm is then released from the male reproductive tract (ejaculation) Erection reflex = a key element to successful copulation is the ability of the male to achieve and sustain an erection. Erectile dysfunction (impotence) = the inability to achieve or sustain an erection, disrupts the sex act for both men and women. Causes: diabetes damage to nerves and vascular, cardiovascular disease and atherosclerosis ed can be an early warning sign of. Cvd: neurological disorder such as anxiety and depression, various drugs, alcohol and tobacco.
