circulatory system

Why is there two different kinds of blood:

When you breath in your lungs are filled with air and your blood gets pumped through your lungs and it gets oxygenated and then it is revived and goes bright red. Then it is pumped through the veins in your body when that happens the blood lets go of its oxygen and picks up co2 then it circulates back to your heart and back into the lungs and lets go of the co2 and then you breathe it out this is a picture of the whole system.

This picture shows that the blood with co2 on it is blue and the blood with oxygen on it is red.The blue goes into the lungs to be oxygen

anted and then turns red.  It goes back to your heart and is given a push. It is pumped around your body drops it oxygen and then picks up co2.  Then it  starts again.

Your heart:

Did you know that your heart pumps 5 quarts of blood every minute and 100,000 beats per day? That means that it beats 35 million beats in one year. There are 4 parts of the heart there is the left ventricle and the right ventricle they contract and push blood into your lungs. It is called systole then your ventricles relax and blood from the upper chambers is flowing into them.The upper chambers are called the left and right atrium. There are also 4 valves in each piece of the heart that keep it in time. They are called the pulmonary valve,the tricuspid valve,the aortic valve and the mitral valve . These valve are what separate oxygen rich blood from the oxygen poor blood.

How your blood system works:

Blood is actually made up of lots of different blood cells .These are what carry nutrients to different parts of your body and they take oxygen and pick up co2 that is why your veins are blue and red. blue blood isn't actually blue it is dark red and red veins Cary bright red blood.every time the blood goes round your body it is like a race track when it is at the end it is tired so then it goes through the lungs again and is oxygenated and then it can start again.

conclusion:

If you didn't have a heart you're couldn't pump blood so there

would not be any blood so you would die !!! dun dun daaaaaaa.

     The End!!!