Muscles and Bones (Part 2)

When we breathe in, the ribs move...

• downward and outward

• upward and inward

• upward and outward

• downward and inward

When we breathe out, the ribs move...

• upward and inward

• upward and outward

• downward and inward

• downward and outward

Breathing in is called...

• inhalation

• exhalation

Breathing out is called...

• inhalation

• exhalation

When we breathe in the volume of the lungs...

• decreases

• increases

• stays the same

When we breathe out the volume of the lungs...

• decreases

• increases

• stays the same

When we inhale or breathe in the diaphragm...

• relaxes and moves down

• contracts and moves down

• relaxes and moves up

• contracts and moves up

How does air move into our body?

• nose -> trachea -> bronchioles -> bronchi -> alveoli

• nose -> bronchi -> trachea -> bronchi -> alveoli

• nose -> bronchi -> bronchioles -> traches -> alveoli

• nose -> trachea -> bronchi -> bronchioles -> alveoli

Air is made up of...

• 78% oxygen, 21% nitrogen and the rest of carbon dioxide and other gases

• 78% nitrogen, 21% carbon dioxide and the rest of oxygen and other gases

• 78% nitrogen, 21% oxygen and the rest of carbon dioxide and other gases

The gas that enters the blood from the lungs is...

• nitrogen

• oxygen

• hydrogen

• carbon dioxide