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b)
c)
2.a)The left ventricle, the largest and most muscular of the four chambers, is the main pumping chamber of the heart. When the left ventricle contracts, blood is pumped through the aortic valve into the main artery of the body (aorta)
b) the right and left atria, receive incoming blood.
3) I am guessing that they would look and feel like blue and red raw spaghetti but not as hard.
4)This amazing organ is a product of evolution and has spent millions of years perfecting itself in order to keep humans alive.The four-chambered heart has a distinct advantage over simpler structures: It allows us to send our "dirty" blood to the cleaners-the lungs-and our "clean" blood to the rest of the body without having to mix the two. That system is very efficient.
5)Make sure that all the experiments you do on measuring your pulse rate are fair (don’t eat before the experiment or do not do exercise). I will write down variables which should be included in this experiment:
1. The time in which you do the experiment should be kept the same (unless you are testing your pulse rate in a different way).
2. Change the number of exercises you do.
3. Do the same type of exercise each time (for example star jumps!)
4. Wait until your pulse rate returns to normal before doing the exercise again.
5. Do the experiment in the morning when you wake up. This is a whole lot easier then doing it in the afternoon because if you want to do this experiment twice you have to eat and rest the same amount which you did the day before
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