When we breathe in, air travels down tubes called the _______ _______.
respiratory tract
Air, entering the body through the mouth and ________travel to the neck.
nostrils
The respiratory tract runs from the neck to the chest. It contains the ________ layrnx and trachea.
pharynx
At the end of the trachea, two small tubes called ______ connect to the ______.
bronchi, lungs
Inside the lungs the bronchi divide into smaller tubes called ___________
bronchioles
At the end of the bronchioles there are tiny air sacs called ______. They are surrounded by blood capillaries
alveoli
Underneath the lungs there is a muscle called the ________
diaphragm
