As an energy source, To heal and build and repair tissue, To sustain growth, To help transport oxygen to the cells, To regulate body functions. hope this helped :)
Lungs- heart- arteries. Capillaries- veins
Answer:
I think it's B but not 100% positive
Explanation:
Answer: your answer is b testicles
Explanation: i know this well because we just finished this sudject in my school so it is fresh in my brain
