Answer:
Which are bundles of cells in the lungs that take in oxygen? Alveoli.
Explanation:
Answer option A is correct. Hope you have a great day.
B. No since rusting is a chemical change it does not follow the law of conservation of mass.
The heart<span> is at the center of your circulatory system, which is a network of blood vessels that delivers blood to every part of your </span>body. Blood carries oxygen andother<span> important nutrients that all </span>body organs<span> need to stay </span>healthy<span> and to </span>work<span>properly.</span>
4
Explanation:
I am not positive but it makes more sense