The Respiratory System - Hurumanu - Science

In Science, we are currently learning about the 'Respiratory System', its function and why we need the organs that relate to it. 

Questions: 

Which two gasses are the respiratory system trying to move to? 

Into the body - Oxygen

Out of the body - Carbon Dioxide 

Why do we need oxygen in our body? We need oxygen because it burns the fuels in our body which are the sugar and fatty acids. It then creates energy which our body needs in order to function. 

What do each of these features do to help us breathe:

Feature:	Breathing In:	Breathing Out:
Diaphragm	Contracts and flattens	Relaxes
Intercostal muscles/ Rib cage	Contracts	Relax or deflate
Lungs	Lungs expand	Lungs get smaller
Chest	Chest enlarges	E.g. Chest falls