Science - Respiratory System

Breathing and Respiration

Activity:

Use the slideshow to help you answer the Questions below: Respiratory System Slideshow

1. Do 15 min of Quizlet

2. Which two gases are the respiratory system trying to move:

INTO THE BODY:	Oxygen (O2)
OUT OF THE BODY:	Carbon Dioxide (CO2)

Why do we need oxygen in our body?

We breathe because oxygen is needed to burn the fuel [sugars and fatty acids] in our cells to produce energy. Oxygen is brought into the lungs via breathing, where it is transported by red blood cells to the entire body to be used to produce energy.

4. Click on the picture below… then Edit the drawing to complete the 3 tasks.

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

Feature:	Breathing In:	Breathing Out:
Diaphragm	Diaphram contract and move forward.	Diaphram muscle relaxed
Intercostal muscles/ Rib cage	rib cage both upward and outward when you inhale.	Rib cage muscle relaxed
Lungs	lungs expand	Lungs deflate
Chest	Chest enlarged	Chest falls