diaphragm
epiglottis
alveolus
Sinus
inhalation
cilia
expiration
bronchioles
bronchi
trachea
lid-like piece of cartilage covering the larynx
thin hairs attached to the mucus membrane epithelium lining the respiratory tract
windpipe
the act of breathing air out
muscle separating the chest and the abdomen
branches of the trachea leading into lungs
air sacs in the lungs
Air-filled cavity that provides resonance for voice
small branches of the tubes leading into the lungs
the act of breathing air in