The walls of veins have the same three layers as the ________.
A. Arteries
B. Capillaries
C. Tissue
D. Soma
A. Arteries
Yes, it is A.
To find the answer to this question, you can start by understanding the structure of veins and identifying the three layers that make up their walls.
Veins are blood vessels that carry deoxygenated blood back to the heart from various body tissues. Like arteries and capillaries, veins are part of the circulatory system. However, the structure of their walls differs.
To find out which option has the same three layers as the walls of veins, let's go through the given options:
A. Arteries: The walls of arteries have three layers known as tunics. These layers are the tunica intima (inner layer), tunica media (middle layer), and tunica externa (outer layer). This matches the structure of veins, so option A is a possibility.
B. Capillaries: Capillaries, the smallest blood vessels, have very thin walls consisting of only one layer of endothelial cells. Therefore, option B is not the correct answer.
C. Tissue: While veins do contain various types of tissue, this option does not directly address the layers present in their walls. Therefore, option C is not the correct answer.
D. Soma: Soma refers to the cell body of a neuron. It is not related to blood vessels or their structure. Therefore, option D is not the correct answer.
Based on the explanation above, the correct answer to the question is A. Arteries, as they have the same three-layer structure (tunics) as the walls of veins.