What are the functions of the breathing system?

What is external respiration?

When taking in a breath. What happens?

What are the parts of the breathing system?

Whats the name given to the tiny blood vessels that cover the outside of the Alveoli?

Gases such as oxygen and carbon dioxide pass through the capillaries by a process called _______

What % of Oxygen do we breathe in?

What % of Carbon dioxide to we breathe in?

What % of oxygen do we breathe out?

What % of Carbon dioxide do we breathe out?

Some harmless effects of smoking;

What is breathing also known as?

Oxygen gas leaves the alveoli and enters the bloodsteam

This swapping of gas is called ______ ____________