Arteries are tube-like organs of the circulatory system. They have three distinct layers. The middle layer contains smooth muscle tissue, which contracts and relaxes to push blood through the artery. It also contains elastic connective tissue that gives the artery flexibility and helps to regulate blood pressure.
Which statement describes how the tissues in this layer relate to the artery's function?
A.
The two tissues are made up of the same types of cells, allowing each tissue to perform all the functions of the artery.
B.
The two tissues contain different types of cells, allowing each tissue to perform different functions for the artery.
C.
The two tissues contain identical cells, but the shapes of two tissues allow them to perform different functions.
D.
The two tissues lack cells, but their position in the middle layer allows each tissue to perform their specific functions.