Chapter 12: Vocab Flashcards
adenoids
lymphatic tissue in the nasopharynx; pharyngeal tonsils
alveolus
plural: alveoli
air sac in the lung
apex of the lung
tip or uppermost portion of the lung
base of the lung
lower portion of the lung
bronchioles
smallest branches of the bronchi
bronchus
plural: bronchi
branch of the trachea that is a passageway into the lung; bronchial tube
carbon dioxide
gas produced by body cells when oxygen and carbon atoms from food combine; exhaled through the lungs
cilia
thin hairs attached to the mucous membrane epithelium lining the respiratory tract, clears bacteria and foreign substances from the lung
diaphragm
muscle separating the chest and abdomen, it contracts to pull air into the lungs and relaxes to push air out
epiglottis
lid-like piece of cartilage that covers the larynx, preventing food from entering the larynx and trachea when swallowing
expiration
breathing out (exhalation)
glottis
slit-like opening to the larynx
hilum of the lung
midline region where the bronchi, blood vessels, and nerves enter and exit the lungs
inspiration
breathing in (inhalation)
larynx
voice box; containing the vocal cords