Chapter 4 Flashcards
(153 cards)
Cardiopulmonary
Pertaining to the heart and lungs
Respiratory System
The structures of the upper respiratory system include the nose, nasal cavity, and pharynx (throat). The lower respiratory system includes the larynx (voice box) , trachea (windpipe), bronchi, bronchioles, lungs, and thorax.
The functions of the respiratory system are to bring oxygen into the body and expel carbon dioxide.
Mucosa
Mucous membrane that lines most of the respiratory system. It warms and humidifies incoming air. It produces mucus to trap foreign particles and bacteria.
Nasal cavity
Hollow area inside the nose. The nasal septum divides the nasal cavity into right and left sides.
Pharynx
The throat. A shared passageway for both air and food.
Turbinates
Scroll-like projections of bone covered by mucous membrane on either side of the nasal cavity. They slow down and give moisture to inhaled air.
Alveolus
Hollow sphere of cells in the lungs where oxygen and carbon dioxide gas molecules are exchanged.
Apex
Rounded top of each lung
Bronchiole
Small tubular air passageway that branches off from a bronchus and then branches into several alveoli. Its wall contains smooth muscle.
Bronchus
Tubular air passageway supported by cartilage rings. Each bronchus enters a lung and branches into bronchioles.
Bronchial tree
Includes the trachea, bronchi, and bronchioles
Bronchopulmonary
Refers to the bronchi and the lungs.
Cilia
Small hairs that move in waves to take mucus and foreign particles toward the throat to be expelled by coughing or to be swallowed.
Epiglottis
Lid-like structure that seals off the opening to the larynx, so that swallowed food goes into the esophagus, not into the trachea.
Hilum
Indentation on the medial side of each lung where the bronchus, pulmonary arteries, and pulmonary veins enter and exit the lung.
Larynx
Structure that contains the vocal cords and is a passageway for inhaled and exhaled air.
AKA Voice Box
Lobe
Large division of a lung, whose dividing line is visible on the lung’s outer surface.
Lumen
Central opening through which air flows inside the trachea, bronchus, or bronchiole
Parenchyma
Functional part of the lung as opposed to the connective tissue framework.
Surfactant
Compound that reduces surface tension and keeps the wall of the alveoli from collapsing with each exhalation
Trachea
Tube supported by C-shaped rings of cartilage. It is an air passageway between the larynx and the bronchi.
AKA Windpipe
Diaphragm
Sheet of skeletal muscle that divides the thoracic cavity. It contains the trachea (and heart and esophagus)
Phrenic Nerve
Nerve that, when stimulated by the respiratory control centers, causes the diaphragm to contract and move downward; this expands the thoracic cavity and causes inspiration.
Pleural
Double-layered membrane that lines each pleural cavity and secretes pleural fluid.