Glands along the urethra secrete mucous and fluid from the Cowper's glands is added here. Penis Three areas of erectile tissue are housed within a loose layer of skin and connective tissue. There are two corpra cavernosa and the corpus spongiosum. The spongiosum is smaller, houses the urethra and lies under the paired cavernosa. The corpus spongiosum expands distally to form the glans penis.
Circumcision removes a fold of loose skin that covers the glans.
The erectile tissue is spongelike and contains a large vascular bed. The penis serves as a passageway for urine, by virtue of the urethra, and serves as the copulatory organ to deliver semen. This hemodynamic event is controlled by neural input. Erection occurs when vasodilator impulses are delivered by the parasympathetic nervous system which also causes the relaxation of the penile smooth muscle . Dialation of the arterioles of the penis causes the erectile tissue of the penis to fill with blood .