Question

an abnormal tube - like passage from one organ to another or from one organ to the surface is a(n):
a stenosis
b hemorrhoid
c anastomosis
d fistula

Explanation:

Stenosis refers to narrowing of a passage, a hemorrhoid is a swollen vein in the anus or rectum, and anastomosis is a surgical connection between structures. A fistula is an abnormal tube - like passage between organs or from an organ to the surface.

Answer:

D. fistula