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