Respiratory Tracts
The portion of the respiratory system that includes the nasal cavity, sinuses, and pharynx.
What is the upper respiratory tract?
The physical movement of air into and out of the lungs.
What is ventilation?
The amount of air inhaled or exhaled during normal, quiet breathing.
What is tidal volume?
A substance that reduces surface tension in the alveoli.
What is surfactant?
The principal muscle of inspiration.
What is the diaphragm?
The portion of the respiratory system that includes the larynx, trachea, bronchi, and lungs.
What is the lower respiratory tract?
The exchange of oxygen and carbon dioxide between the alveoli and the blood.
What is external respiration?
The volume of air remaining in the lungs after a normal exhalation.
What is functional residual capacity?
The ease with which the lungs inflate.
What is compliance?
The muscles that assist the diaphragm during normal inspiration.
What are the external intercostal muscles?
The structure that filters, warms, and moistens incoming air.
What is the nasal cavity?
The exchange of oxygen and carbon dioxide between the blood and body cells.
What is internal respiration?
The maximum volume of air the lungs can hold after a maximal inhalation.
What is total lung capacity?
The presence of air in the pleural cavity causing lung collapse.
What is pneumothorax?
The reason normal expiration does not require muscle contraction.
What is elastic recoil of the lungs?
The structure that serves as the voice box and maintains an open airway.
What is the larynx?
The term that refers broadly to gas exchange rather than air movement.
What is respiration?
The volume of air remaining in the lungs after maximal exhalation.
What is residual volume?
The two factors that aid lung collapse during expiration.
What are elastic recoil of lung tissue and surface tension of alveolar fluid?
The muscles used during forced inspiration.
What are the sternocleidomastoid, pectoralis minor, and scalene muscles?
The first branches of the trachea that enter the lungs.
What are the primary bronchi?
The structure where external respiration takes place.
What are the alveoli?
The lung volume that prevents alveolar collapse and allows continuous gas exchange.
What is residual volume?
The two factors that prevent total lung collapse and aid inspiration.
What are negative pressure in the pleural cavity and surfactant?
The muscles used during forced expiration.
What are the abdominal muscles and internal intercostal muscles?