1. PP2 - RESPIRATION EXCHANGE OF GASES
PowerPoint® Lecture Slide Presentation by Robert J. Sullivan, Marist College
PP2 - RESPIRATION
EXCHANGE
OF GASES
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings.

2. What is Human Respiration?
The human respiratory system allows one to obtain oxygen, eliminate carbon dioxide.
Breathing consists of two phases, inspiration and expiration
Inspiration- the process of taking in air
Expiration- the process of blowing out air

3. Human Respiratory System
Figure 10.1

4. Components of the Lower Respiratory Tract
Figure 10.3

5. Gas Exchange Between the Alveoli and the blood, and the blood and cells
The blood then carries O2 to and CO2 away from every cell
Figure 10.8A

6. Why do living things need Oxygen?
Every living thing needs Energy to grow, move, reproduce, digest food and make new substances.
Living things generate energy using a chemical reaction that happens in EVERY cell
This reaction is called Cellular Respiration

7. Four Respiration Processes
Breathing (ventilation): air in to and out of lungs
External respiration: gas exchange between air & blood
Internal respiration: gas exchange between blood and tissues
Cellular respiration: oxygen is used to break down glucose and use the energy to produce ATP. Carbon dioxide is waste

9. From the food we eat

10. Breathed in from the air
From the food we eat
Breathed in from the air

11. Breathed in from the air
From the food we eat
Breathed in from the air
Breathed out

12. Breathed in from the air
From the food we eat
Breathed in from the air
Breathed out, or sweated or urinated
Breathed out

13. Breathed in from the air Stored as ATP for when needed
From the food we eat
Breathed in from the air
Breathed out, or sweated or urinated
Stored as ATP for when needed
Breathed out

15. Evidence is in our breath
We breathe out more carbon dioxide than we breathe in (some was in the air to start with, PLUS the waste from cellular respiration)
We also breathe out more water vapour than we breath in
Inhaled air
Exhaled air
nitrogen gas
78%
oxygen gas
21%
16%
carbon dioxide gas
   0.03%
 4%
water vapour
variable
more

16. Todays Activity
As a group, take it turns to create a mind map on the board, by sticking one of the words up and drawing an arrow to where there is a link, and labelling the arrow.