Questions

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Questions

Solve:
y+7=24

N–4=543

Z–72=4


MULTIPLICATION AND DIVISION:

5•4=

24÷3=

8•4=

The four chambers of the heart.

The four chambers of the heart are:


Right Atrium—–—–––––––––––––––––––––––––––––––>


Right Ventricle—–—–––––––––––––––––––––––––––––>

The chambers are the same on the other side although they are called the left atrium and left ventricle.

Steps of inhalation and exhalation.

How do the lungs take in oxygen? The steps it takes is:

• The diaphragm moves down (it is a muscle under the lungs)
• The ribs move up and out.
• This creates a low pressure system in the lungs.
• It forces air from the surrounding area into the lungs.
• The diaphragm moves up.
• The ribs move down and in.
• This creates high pressure and forces the air out.

Here is a diagram of the heart so that you can study it. It may help in science class.