anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical structure; "he has good bone structure"

tubule - a small tube

salpinx - a tube in the uterus or the ear

cochlea - the snail-shaped tube (in the inner ear coiled around the modiolus) where sound vibrations are converted into nerve impulses by the Organ of Corti

vas, vessel - a tube in which a body fluid circulates

anatomy, general anatomy - the branch of morphology that deals with the structure of animals