ANATOMY

Detailed explanation-1: -Urethra. This tube allows urine to pass outside the body.

Detailed explanation-2: -The spongy urethra is surrounded by the corpus spongiosum and forms the terminal conduit communicating with the outside of the body.

Detailed explanation-3: -The opening to the outside is the external urethral orifice. The mucosal lining of the urethra is transitional epithelium. The wall also contains smooth muscle fibers and is supported by connective tissue. The internal urethral sphincter surrounds the beginning of the urethra, where it leaves the urinary bladder.

Detailed explanation-4: -The part of the urethra that is closest to the bladder is called the proximal urethra. The part that is closest to where the urine leaves the body is called the distal urethra. The urethra is about 8 inches long in men and about 1½ inches long in women.

Detailed explanation-5: -The lamina propria (also called the submucosa) is a thin layer of connective tissue that surrounds the urothelium. It contains blood vessels, nerves and glands. The muscularis propria is the thick, outer muscle layer of the bladder.