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Chapter 12

Vocabulary - Respiratory System

Adenoids: Lymphatic tissue in the nasopharynx; pharyngeal tonsils.
Alveolus ( plural; alveoli ) Air sac in the lung.
Apex of the lung: Tip or outermost portion of the lung .An apex is the tip of a structure. Apical means pertaining to or located at the apex. The apex of the heart is at the bottom of the heart.
Base of the lung: lower portion of the lung; from the Greek ; basis, foundation. Basilar means located at or in the base.
Bronchiolitis: Smallest branches of the bronchi.
Bronchus (plural;bronchi) Branch of the trachea (windpipe) that is a passageway into the lung; bronchial tube.
Carbon dioxide: Gas produced by the 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. They clear bacterial and foreign substances from the lung. Cigarette smoke impairs the function of the cilia.
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 during 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. Hilar means pertaining to (at) the hilum.
Inspiration: Breathing in (inhalation).
Larynx: Voice Box; containing the vocal cords.
Lobe: Division of a lung.
Mediastinum: Region between the lungs in the chest cavity. It contains the trachea, heart, lymph nodes, aorta, esophagus, in bronchial tubes.
Nares: Opening through the nose carrying air into the nasal cavity.
Oxygen (02): Gas that may 21% of the air. It hasn't into the bloodstream at the lungs and travels all body cells.
Palatine tonsil: One of a pair of almond shaped masses of lymphatic tissue into the oropharynx (Palatine means pertaining to the roof of the mouth).
Paranasal sinus: One of the air cavities in bones near the nose.
Peritoneal pleura Outer layer of pleura lying closest to ribs and chest wall.
Pharynx: Throat; including the nasopharynx, oropharynx and laryngopharynx
Pleura: Double layered membrane surrounding each lung.
Pleural cavity: Space between the folds of the pleura.
Pulmonary parenchyma: Essential parts of the lung, responsible for respiration; bronchiolitis and alveoli.
Respiration: Process of moving air into and out of the lungs; breathing.
Trachea Windpipe.
Visceral pleura: Inner layer of the pleura lying closer to the lung tissues.
Created by: Bowiegirl