heart, arteries, and veins
Answer:
I agree it would be A) IT is a reactant in a chemical reaction
Explanation:
a catalyst is a substance that causes a chemical reaction to happen in a different way than it would happen without that catalyst
Is veins in charge of transporting the blood
None...........................probably mars
Answer:
Adult stem cells
Explanation: Some very specialized somatic cells such as cardiac muscle cells, nerve cells, and red blood cells do not undergo mitosis.