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Penis

Definition

The penis is the male organ used for urination and sexual intercourse. The penis is located above the scrotum . It is made of spongy tissue and blood vessels.

The shaft of the penis surrounds the urethra and is connected to the pubic bone.

The foreskin covers the head (glans) of the penis. The foreskin is removed if the boy is circumcised.

Information

During puberty, the penis lengthens. The ability to ejaculate begins at around age 12 to 14. Ejaculation is the release of sperm-containing fluid from the penis during an orgasm.

Conditions of the penis include:

  • Chordee -- downward curve of the penis
  • -- urethra opening is on the top or side of the penis, rather than the tipEpispadias
  • -- urethra opening is on the underside of the penis, rather than at the tipHypospadias
  • Palmatus or webbed penis -- penis is enclosed by the scrotum
  • -- a curve during an erectionPeyronie's disease
  • Buried penis -- penis is hidden by a pad of fat
  • Micropenis -- penis does not develop and is small

See also:

References

Elder JS. Anomalies of the penis and urethra. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. 19th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 538.

Brooks JD. Anatomy of the lower urinary tract and male genitalia. In: Wein AJ, ed. . 9th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 2.

Jordan GH, Schlossberg SM. Surgery of the penis and urethra. In: Wein AJ, ed. . 9th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 33.

Elder JS. Abnormalities of the genitalia in boys and their surgical management. In: Wein AJ, ed. . 9th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 126.

Encyclopedia content is provided as information only and not intended to replace the advice and instruction from your personal physician.