1. 
Where is the heart found in the body?

2. 
What are the three main parts of the circulatory system?

3. 
Fill in the blank:

The left side of the heart pumps blood that contains around the body.

4. 
Fill in the blank:

The circulatory system carries food and to all parts of the body.

5. 
True or False: The heart is a special muscle whose function is to pump blood through the body.

6. 
Fill in the blank:

The process of the heart pumping blood around the body is called .

7. 
In Marcus's results (Workbook), which activity gave him the highest pulse rate?

8. 
Fill in the blank:

Blood is a red liquid that flows around the .

9. 
Which waste gas does blood pick up from the body and carry away?

10. 
True or False: The veins that carry blood from the lungs to the heart are the only veins that carry blood with oxygen.

11. 
Which type of blood vessel carries blood away from the heart to the body and has a thick elastic muscular wall?

12. 
Fill in the blank:

There are three kinds of blood vessels: arteries, veins and .

13. 
Fill in the blank:

Capillaries are very narrow with thin walls, joining arteries and .

14. 
Fill in the blank:

You can count your heartbeats by feeling your .

15. 
True or False: The right side of the heart pumps blood without oxygen to the lungs only.