用glans penis造句子，“glans penis”造句

"Three long columns of tissue extend through its length, covered by elastic tissue and a thin layer of skin. One expands at the tip into a mushroom-shaped structure (glans penis) and contains the urethra (see urinary system), which ends in a slitlike opening."

An abnormal constriction of the foreskin that prevents it from being drawn back to uncover the glans penis.