2. At this station you will: Learn the 3 main functions of the cardiovascular system. Learn the main parts of the cardiovascular system. Determine how much blood is in a human body.

3. How many liters of blood are there in the human body? Talk to your group about your first estimate. Write you first estimate on your task sheet.

4. Now find a liter container at your station. Fill this liter container with liquid. Humm? Would you like to change your estimate? If so, talk to your group and make a second estimate.

5. Now fill a container with two liters of liquid. Do you think that is how much blood is in the human body? Talk to your group Now fill a container with four liters of liquid. Do you think that is how much blood is in the human body? Talk to your group

6. Now fill a container with five liters of liquid. Do you think that is how much blood is in the human body? Talk to your group Could this be the answer?

7. The human body contains an estimated 5 liters of blood.

8. How long does it take for all this blood to circulate through the body?

9. Talk to your group. What is your first prediction? Write it on your task sheet.

10. How much time does it take for the 5 liters of our blood to circulate through the body? 20 seconds

11. Use your textbook (Chapter 3, pgs. 78-89) or the websites below to learn about the Cardiovascular System. Record the answers to the following questions on your data sheet: What is the function of the Cardiovascular System? (pgs. 78-79) What are the main parts or organs of the Cardiovascular System? Why is the Cardiovascular System also referred to as the Circulatory System?

12. As time permits, visit a couple of websites and watch a couple of videos: http://kidshealth.org/kid/htbw/heart.html http://www.kidport.com/RefLib/Science/HumanBody/Heart.ht m http://www.kidport.com/RefLib/Science/HumanBody/Heart.ht m http://yucky.discovery.com/noflash/body/pg000131.html Watch the videos: (1) Blood Flow in the Heart and (2) Circulation http://www.kidport.com/RefLib/Science/HumanBody/Cardiova scular/Video/HeartBloodFlowVideo.htm http://www.kidport.com/RefLib/Science/HumanBody/Cardiova scular/Video/HeartBloodFlowVideo.htm Watch the videos from the textbook (chapter 3): (1) The Heart, (2) Two Loops, and (3) Blood

13. Reset the station’s supplies. Go back to the first slide so the next group can begin. Back to Beginning