The penis consists of thin skin, connective tissue, blood and lymphatic vessels, fascia, the corpora cavernosa, and corpus spongiosum containing the spongy urethra. Distally, the corpus spongiosum expands to form the conical glans penis, or head of the penis. The margin of the glans projects beyond the ends of the corpora cavernosa to form the corona of the glans. The corona overhangs an obliquely grooved constriction, the neck of the glans, which separates the glans from the body of the penis. The slit-like opening of the spongy urethra, the external urethral orifice (meatus), is near the tip of the glans penis.