SECTION 2 – THE CIRCULATORY SYSTEM

The object of this lesson is for students to learn about the structure and function of the circulatory system through experiments and through research done in books and on the Internet.

Science IRP:

It is expected that students will:

LESSONS:
  1. In class you should have completed your study of the Respiratory System and students have completed this section on the model that they are constructing. Now ask them what they know about the Circulatory System and ask them what they would like to know about it.

  2. Distribute the "Circulatory System Work Sheets". In the computer lab, have students open the Internet and type in the following beside location or go to the links page and open this:
    3.

http://library.thinkquest.org/5777/cir1.htm

Use the information found in this site to answer the questions. Use pictures in this site and use library books to complete the diagram.

If students can’t finish this during their computer time, use books in the library to complete them.

3. In class have students conduct experiments to solidify their knowledge:

1. In PE have students record their heart rate before exercising and then during various activities.

ex.

Name:_____________________ Heart Rate in 10 Seconds Heart Rate in 1 minute
At Rest
Walking
Running
Skipping
Other

 

In the computer lab have students create a graph showing their heart rate. This could be moved into Microsoft Word for students to write about why exercise causes their heart rate to increase.

2. Have students create a stethoscope and listen to each other’s heartbeat. Instructions for this experiment are at:

http://sln2.fi.edu/biosci/activity/bio-2.html

 

4. As a culminating activity have students add the circulatory system to the life sized model they began during your study of the Respiratory System.

ANSWERS TO WORKSHEETS:
  1. Circulation is the flow of blood around the body.
  2. Heart, arteries, capillaries and veins.
  3. Left
  4. The largest artery in the body.
  5. We need oxygen for cells in the body and the brain to work.
  6. Arteries
  7. Veins
  8. Carbon dioxide is removed at the lungs.
  9. When blood goes into the lungs carbon dioxide is removed and we breathe it out and the blood gets fresh oxygen from the air that we have inhaled into our lungs.

VEINS AND ARTERIES:
  1. Arteries carry blood away from the heart.
  2. Thinner arteries are called arterioles.
  3. Red
  4. To the heart.
  5. Venules
  6. The blood returning to the heart is dark red because it has no oxygen.
  7. Veins are thinner because blood returning to the heart has less pressure and therefore veins don’t need to be as strong.

HEART:
  1. The heart is divided into the right and left sections and the right side pumps blood to your lungs and the left side pumps oxygen-soaked blood out to the body.
  2. The size of your hand.

BLOOD:
  1. 10.6 pints
  2. Red, white and platelets.
  3. Plasma is made of 95% water and 5% other materials like dissolved salt.