I'm pretty sure the answer would be DNA, because DNA is the thing that holds all of your genetic material/ traits/ genes
Suggest technologies provide initatives monitor disease provide health guidelines. create an international coalition
It is making sure your child is always good, okay and well kept
Vertebrates have closed circulatory systems their blood flows through blood vessels like veins and arteries and they have a heart to push the blood around the body. thats why the human circulatory is a closed system