Human Respirotary System

1. through

1.1. nose

1.1.1. move down

1.1.1.1. windpipe

1.1.1.1.1. whic branches into

2. is made up of

2.1. oxygen

2.2. nitrogen

2.3. carbon dioxide

2.4. water vapour

2.5. other gases

3. human respirotary organ

3.1. nose

3.2. windpipe

3.3. lungs

4. air sacs contains blood vessels

5. Plant respiratory system

5.1. trough stomata

6. human respiratory system

7. Human takes in oxygen and breathe out carbon dioxide

8. Blood carries oxygen around the body

9. The ribcage protects the lungs