Human Respiratory System Basics

Why is Chloe breathing so hard?

• She's out of shape

• Her body needs more oxygen

• Her legs hurt

• He is too heavy to carry

Why does your body start to breath heavier when you are exercising?

• Your body breathes heavier to cool down the skin.
• Breathing heavier helps to digest food faster.
• Heavier breathing is a sign of dehydration.
• Your body breathes heavier during exercise to supply more oxygen to the body.

What is the gas our body needs?

• Nitrogen
• Carbon Dioxide
• Hydrogen
• Oxygen

Where does air enter your body when you breathe?

• Ears
• Nose or mouth

• Eyes
• Skin

The real name for our windpipe is the...

What are the two tubes that split at the end of the trachea?

• Bronchi

• Bronchioles and alveoli
• Trachea and esophagus
• Left lung and right lung

The bronchi take air into these two organs.

• trachea
• alveoli
• diaphragm
• lungs

What is the name of the muscle under your lungs?

• Lungs
• Diaphragm
• Trachea
• Heart

When you breathe in, what does your diaphragm do?

• The diaphragm contracts and moves downward.

• The diaphragm expands and moves upward.

• The diaphragm remains still during breathing.
• The diaphragm contracts and moves sideways.

What are the smaller tubes inside the lungs called?

• Bronchioles
• Alveoli
• Trachea
• Larynx