I think that the answer for "site" should be c. location.
We need to know what the narrative said to answer
Answer:
1) A cardiovascular system is an organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes.
2) "Capillaries connect the arteries to veins. The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart. Veins carry the blood back to the heart."
3) A heart attack is a blockage of blood flow to the heart muscle.
Answer:
Hero's are people that help. (For the question Who are the individuals that you consider to be heroic? You can put any Friend/Family member.) Heroic deeds are helping your mum do chores or just helping people. Some heroric qualities are being brave and smart but also kind.
Explanation:
