Download Heart – circulatory system

Experiment!
How much blood does the heart pump?
Materials: a bucket with 4 liters of water, an empty bucket, a 5-ounce cup and a timer.
Task: One person needs to transfer the water from one bucket to the other. Another team
member will time it, to see how fast you can transfer the water from one bucket to the next.
Learning: How long did it take to transfer the water? The amount of water the cup holds
represents the amount of blood your heart pumps each time it beats. It takes your heart about one
minute to pump 4 liters of blood.
Write what you learned.
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
1. How long did it take to transfer the water?
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
2. How much blood does your heart pump in a day?
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Experiment!
Your heart is a muscle!
Materials:
- one tennis ball per student
-
timer
1. Hold a tennis ball in your hand. Squeeze the tennis ball tightly.
The force needed to squeeze the ball is similar to the force needed to squeeze blood out of the
heart.
2. Squeeze the ball as hard as you can about 70 times in one minute.
How does your hand feel after one minute?
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
What does this demonstrate about the heart muscle?
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
RECORD YOUR IDEAS
Nine Steps of the Circulatory System
1. Oxygen is inhaled into the lungs and then is passed through the capillary walls into the
blood stream.
2. Veins carry the blood to the left side of the heart.
3. The left side of the heart pumps the blood through the aorta and on through the body.
4. Oxygen is released to the cells.
5. Carbon dioxide is picked up by the blood.
6. The vena cava takes the blood back to the right side of the heart.
7. The right side of the heart pumps the blood through the arteries to the lungs.
8. Carbon dioxide leaves the blood through the capillary walls.
9. The lungs send the carbon dioxide out of the body.
The Blood in the Body
(Sung to the tune of “The Wheels on the Bus”)
Dr. Terry Shanahan, UC Irvine Learn English Through Science, April 26, 2003
The blood in the body goes round and round,
Round and round,
Round and round.
The blood in the body goes round and round
All day long.
The blood enters the heart through the right atrium,
Right atrium,
Right atrium.
The blood enters the heart through the right atrium,
Then is pumped through the ventricle.
From the right ventricle, blood goes to the lungs,
To the lungs,
To the lungs.
From the right ventricle, blood goes to the lungs,
Where it gets oxygen.
From the lungs, the blood returns,
Blood returns,
Blood returns.
From the lungs, the blood returns
Into the left atrium.
From the left atrium, the blood is pumped,
Blood is pumped,
Blood is pumped.
From the left atrium, the blood is pumped
Into the left ventricle.
From the left ventricle, the blood flows out,
Blood flows out,
Blood flows out.
From the left ventricle, blood flows out
Through the aorta.
From the aorta, blood goes to the body,
To the body,
To the body.
From the aorta, blood goes to the body
Through the veins and capillaries.
School home connection:
Visit http://medtropolis.com/virtual-body/ if you would like to know study the heart more.
Circulatory System
Main Parts
Heart
Arteries
Veins
Capillaries
Lungs
Function
Your Heart!
1. What is the main function of the heart?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
2. Where is your heart located?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
3. How is the left side of the heart different from the right side of the heart?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
4. What is the difference between veins and arteries?
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
________________________________________________________________________
Fill in the blanks with the correct words
Capillaries
Veins
Red blood cells
Muscle
Arteries
5. ____________________________ carry oxygen and carbon dioxide throughout the
body.
6. The biggest blood vessels are called _____________________ and they carry blood from
the heart.
7. The heart is a cardiac ____________________.
8. Oxygen-poor blood makes its way back to the heart through _________________.
9. _____________________ are tiny blood vessels that pass food and oxygen to the body.