Body Systems Practice Test

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Body Systems Practice Test
1) What does the heart do?

2) Label the 4 chambers of the heart

3) Why is the left side of your heart bigger than the right side?

4) Why are the artery tubes leaving the heart thicker and stronger than the vein tubes bringing blood to the heart?

5) What is the difference between blood going to your lungs and blood coming from your lungs?

6) What is the function of the lungs?
_______________ in, ______________ out

7) How does oxygen effect the color of blood?

8) What is the name of the air sacs in the lungs?

9) The veins and arteries are too thick for oxygen and CO2 to pass through them. The air sacs are covered in tiny hair-like blood tubes called ___________________. These are thin enough for the oxygen to pass through.

10)  Does your heart beat while you are sleeping?  Why?

11)  How does the stomach break food down into nutrients?

12) What are nutrients?

13)  What passes into the blood at the intestines? Why?
14) The mucous lining in the intestines makes 80% of the ___________________ which are chemicals which communicate with the brain. These can tell the body it is hungry, angry, happy, or mad.

15) How can you feed the healthy bacteria in your intestines (gut)?

16)  What two things does the blood bring to every cell?  Why?

17)  How does the cell use the nutrients and oxygen?

18) Where does the energy in the nutrients come from?

19)  What two things leave the cell?

20)  At the cell, the blood changes from red to________.

21)  Where does the blood leaving the cell go?

22)  Why is the circulatory system called a cycle? 

23) How can you help keep your body healthy?

24)  What are five questions that you would like to know about the human body?