A penis is an external male reproductive organ found in animals, including humans, and is responsible for several functions related to reproduction and the excretion of urine. It is typically cylindrical in shape and consists of three main parts: the root, body, and glans.
The root of the penis is anchored within the pelvis and provides support and stability. The body, or shaft, extends from the root and terminates at the glans, the enlarged tip at the end of the penis. The glans is highly sensitive due to its rich nerve supply and is covered by a protective fold of skin called the foreskin, which may be surgically removed in a procedure called circumcision.
The penis serves various functions, primarily related to sexual reproduction. During sexual arousal, the penis can become erect, increasing in size and rigidity, which allows for penetration during sexual intercourse. At the moment of ejaculation, semen passes through the urethra, a tube within the penis, and is expelled from the body.
In addition to its role in sexual reproduction, the penis also serves the purpose of excreting urine. When the bladder is full, urine flows through the urethra and is expelled from the body via the opening at the tip of the penis.
Overall, the penis plays a crucial role in sexual and urinary functions and is a distinctive characteristic of the male anatomy.
