Answer :
Answer: A) the veins.
Explanation:
The movement of oxygen through the body is crucial for maintaining life in the body. In the body, oxygen is absorbed in the lungs and then further spread to the body. The body must be continuously supplied with oxygen through the bloodstream because there are no oxygen reserves in the body. Circulating oxygen through the body is a prerequisite for the health of the organism, the function of the brain, heart, and all other organs.
there are more than one answers for this veins is one whats the other i have been looking but can not find it