Human Respiratory System
by Ernaffishah Bte Adbul M Nur
1. Organs
1.1. lungs
1.2. Heart
1.3. Windpipe
1.4. Nostrils
2. Nose
2.1. Allows air to enter body
3. Transport air to lungs
3.1. Windpipe and its branches
4. Diaphragm
4.1. Relaxs/contracts to make chest bigger or smaller