penile function

Penile function involves blood flow, nerve signals, and tissue health. When sexually aroused, the brain sends signals that relax blood vessels in the penis, allowing increased blood flow. This causes the penis to enlarge and become firm (an erection). Blood then gets trapped in spongy chambers (corpora cavernosa), maintaining the erection. After ejaculation or arousal subsides, blood flow decreases, and the penis returns to a flaccid state. Proper function depends on healthy blood vessels, nerves, hormones, and tissue. Issues in any of these areas can affect the ability to achieve or maintain an erection.