Answer:
because they have thicker walls
Explanation:
blood is punped our of the heart very fast which means it would need a blood vessel witch thick walls to withstand the pressure. thin walls would cause the blood vessle damage and may evwn break as it wouldn't be able to withstans the pressure.
The data has to be verifiable by the scientific community.
Anaerobic breakdown of glucose produces lactic acid, which accumulates in the tissues and blood.