4
Question Question 4.
| Name of the part | Functions |
| Nostrils | (d) tiny hair and mucus help to trap dust and dirt from the |
| Nasal passages | (a) fresh air from outside enters |
| Windpipe | (e) air we breathe air reaches our lungs through this part |
| Alveoli | (b) exchange of gases occurs |
| Ribcage | (c) protects lungs |