Biology Question?

[Mark]

The air sacs in the lungs and the lining of the human intestine are very different structures; however, there are some similarities among the cells that make up these structures. What is the significance of these similarities?

A. They increase the surface area for exchange with the environment.

B. They have more organelles within their cytoplasm.

C. They require more oxygen than other cells to perform their metabolic functions.

D. They require greater protection due to the size of the organs.

E. There is no significance to the similarities; the cells do not have similar functions.