3NT Module 6 Chapter 10 Breathing part II

The windpipe is a

The windpipe is a hollow tube that brings the air from the nose to the

Mucus helps to trap ............ ...... ......................

The windpipe is a

The windpipe branches into two tubes called the

The lungs contain many air sacs called

.................. ...................... moves from the bloodstream into the lungs to be exhaled.

The ribcage protects the ............ ......... ........ ................

It helps in breathing by assisting the ..................... ........ ........................ of the lungs.