Only one quarter of the clitoris is visible. The rest of it is inside the body,and is actually about the same size as a penis. The clitoris is made up of many different parts, including the clitoral head, the hood the clitoral shaft, the urethral sponge, erectile tissue, glands, vestibular bulbs and the crura (or the clitoral legs). Only the clitoral head and the hood are located outside the body.
All babies, upon conception, have the exact same genital tissue. At about 12 weeks, each baby’s genitalia begin to differentiate into a penis or labia. So, in a sense, the clitoris and penis are the same materials put together in a different way. The clitoris has a glans, a foreskin (also known as the hood), erectile tissue and a shaft. It even swells when it's aroused.