Answer:
adenine, guanine, cytosine, or thymine
Answer:
Type B are cardiac muscles, because they are not found in any other part of the body.
Explanation:
I believe the answer is Density have a very nice day
If capillaries had thick walls and large diameters, it would be much harder for diffusion to occur. Capillaries are usually thin so that it is easy for gases, nutrients, and wastes to diffuse in and out of the blood. If they were thicker, this diffusion would be much more difficult.
