Respiratory System

When we breathe, we take in ....

• nitrogen

• carbon dioxide

• oxygen

• hydrogen

The respiratory organ in the picture is called ....

• lung

• trachea

• bronchioles

• bronchi

Why is the left lung slightly smaller than the right lung ?

• to give space for the heart

• to breathe easily

• to give space for the stomach

• to swallow easily

The other name for trachea is ....

• food pipe

• wind pipe

• lung

• heart

The diaphragm is in letter ....

• a

• b

• c

• d

• e

The lung is in letter ....

• a

• b

• c

• d

• e

Inside the lungs, the bronchi divide into smaller tubes. At the end of these tubes, there are tiny sacs called...

• Pharynx

• Trachea

• Lungs

• Alveoli

When we breath in the diaphragm...

• Contracts

• Relaxes

When we breathe out the diaphragm...

• Contracts

• Relaxes

When we breathe out, the ____________ leaves our lungs.

• Carbon dioxide

• Oxygen