Understanding the Respiratory System

These are tiny sacs at the end of the bronchioles filled with air

• Lungs
• Trachea
• Alveoli
• Bronchi

True or False: People do not have to think about breathing because the respiratory system works on its own

• True

• False

What is the voice box called?

• trachea
• esophagus
• pharynx
• larynx

This is also known as the windpipe.

• trachea
• larynx
• esophagus
• bronchus

The heart pumps blood through the veins to send ______ to every cell in the body

When the diaphragm tightens it means you are breathing

Tubes that go into each lung and look like tree branches

• Bronchi
• Larynx

• Trachea
• Alveoli

Which bones protect the lungs?

• The spine
• The skull
• The rib cage
• The pelvis

What causes your vocal cords to vibrate back and forth and make sound?

• Vocal cords vibrate from external sound waves.
• Sound is produced by the movement of the tongue.
• The moving air

• Vocal cords vibrate due to muscle contractions.

What is the job of the respiratory system?

• To transmit nerve signals to the brain.
• To circulate blood throughout the body.
• To digest food and absorb nutrients.
• To breathe, but it also helps people speak. Air contains oxygen, which the body’s cells need to work.