Mechanism of erection.
D000328:Adult; D001341:Autonomic Nervous System / Q000502:physiology; D048909:Diabetes Complications; D007172:Erectile Dysfunction / Q000209:etiology; D006801:Humans; D008297:Male; D010413:Penis / Q000098:blood supply / Q000294:innervation / Q000502:physiology*; D011584:Psychology; D013119:Spinal Cord Injuries / Q000150:complications