Respitory System

Front

Our breathing system is called the ____________ system.

Back

respiratory

Front

The human body breathes out _________.

Back

carbon dioxide, CO2

Front

The strong, curved muscle attached below the lungs to the lower ribs and backbone is called the _________.

Back

diaphragm

Front

The flap of tissue that covers the trachea to keep food out of the lungs is called the _____________.

Back

epiglottis

Front

The tube that leads from the pharynx to the lungs is called the _________.

Back

trachea

Front

What is the main function of the respiratory system?

Back

To facilitate breathing and gas exchange.

Front

What gas do we inhale that is essential for life?

Back

Oxygen (O2)

Front

What is the process called when oxygen is taken in and carbon dioxide is expelled?

Back

Respiration

Front

What are the tiny air sacs in the lungs where gas exchange occurs called?

Back

Alveoli

Front

What is the role of the diaphragm in breathing?

Back

It contracts and relaxes to help move air in and out of the lungs.