SOMEONE PLS HELP, ILL GIVE BRAINLIEST AND 50 POINTS PLS I NEED ALL ANSWERS also dont mind the missing questions, i already answered those

1) Your heart provides your body with and it needs. It also carries away .

2) Your heart fills with blood. Then its muscle to squirt the blood along. When the heart , it squeezes and sends the blood to other parts of your body.

4) The heart has several valves. What is their function (job)?

5) Think about why blood flowing backwards in the body would not be good for you. Give one reason it would be a bad thing to happen.

6) What is the main difference between arteries and veins?

7) What is the main waste material that the blood picks up to be removed from the body?