alveolus
bronchioles
expiration
diaphragm
bronchi
inhalation
epiglottis
cilia
trachea
adenoids
air sacs in the lungs
the act of breathing air out
muscle separating the chest and the abdomen
lymphatic tissue in the nasopharynx
lid-like piece of cartilage covering the larynx
branches of the trachea leading into lungs
windpipe
the act of breathing air in
small branches of the tubes leading into the lungs
thin hairs attached to the mucus membrane epithelium lining the respiratory tract
