The penile shaft is an elongated organ that extends from the base to the tip of the male genitalia. It consists of three main parts: the root, body, and glans penis. These three parts are connected by tissue called the frenulum. The root is located at the bottom of the penis and is attached to the pubic bone. It is responsible for anchoring the penis during intercourse and supports the rest of the shaft. The body is the longest part of the penis and contains two cylindrical structures called corpora cavernosa. These structures fill with blood when a man becomes aroused, causing the penis to become erect. The corpus spongiosum is a third structure that surrounds the urethra and is responsible for controlling urine flow. The glans penis is the head of the penis and is covered by skin called mucocutaneous membrane. This membrane can be retracted or exposed depending on whether or not the man is aroused. The opening of the urethra is located on the underside of the glans penis. The penile shaft is also home to numerous nerve endings which provide sensation during sexual activity. When a man becomes sexually aroused, blood flows into the corpus cavernosum, causing it to expand and become harder. This creates an erection, allowing for successful penetrative intercourse. The size and shape of the penis vary greatly among men, as does the length and width of the shaft. Some men have shorter or wider shafts than others, but all play a critical role in male reproduction and sexual pleasure.
The penile shaft is composed of three main parts: the body, root, and glans penis. The body extends from the base of the shaft to the tip and is made up of two cylindrical structures called corpora cavernosa. These structures are filled with spongy tissue and are responsible for creating an erection. The corpus spongiosum is a third structure that surrounds the urethra and helps control urine flow. The glans penis is the head of the penis and is covered by mucocutaneous membrane that can be retracted or exposed. All three parts work together to create an erection when a man becomes sexually aroused.