Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'tube'?

A. The fibro-osseous passageway on the palmar side of the wrist that connects the distal forearm to the middle compartment of the deep plane of the palm.
B. A tube or collection of tubes in an animal from the ovaries to the outside of the body.
C. The the concept is an outgrowth of the cloaca and links the pronephric kidney to the exterior.
D. Any hollow cylindrical anatomical structure containing a lumen through which substances are transported.

Answer: Any hollow cylindrical anatomical structure containing a lumen through which substances are transported.