Against the law obviously
Answer:
True
Explanation:
Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.
They will continue to exercise throughout life
Answer:
1. cell
2. tissue
3. organism level/ organism.
Explanation:
have a nice day UwU! (im not a furry)
