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35 terms

Respiratory System

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alveolus
air sac of a lung
aortic body
receptor in the aorti arch sensitive to oxygen content, carbon dioxide content, and blood
auditory tube
air tube that connects the pharynx to the middle ear
bicarbonate ion
the form in which carbon dioxide is carried in the blood
bronchiole
smaller air passages in the lungs
bronchus
one of the two major divisions of the trachea; leads to the lungs
carbaminohemoglobin
hemoglobin carrying carbon dioxide
carotid body
structure located at the branching of the carotid arteries; contains chemoreceptors
concha
shell-shaped structure, such as that seen in the bones of the nasal cavity
epiglottis
structure that covers the glottis during the process of swallowing
expiratory reserve volume
volume of air that can be forcibly exhaled after normal exhalation
external respiration
exchange of oxygen and carbon dioxide between alveoli and blood
glottis
slitlike opening between the vocal cords
hemoglobin
pigment of red blood cells responsible for oxygen transport
inspiratory reserve volume
volume of air that can be forcibly inhaled after normal inhalation
internal respiration
exchange of oxygen and carbon dioxide between blood and tissue fluid
larynx
structure that contains the vocal cords, aka voice box
lungs
internal respiratory organ containing moist surfaces for gas exchange
nasal cavities
space within the nose
nose
specialized structure on the face that serves as the sense organ of smell and as a part of the respiratory system
oxyhemoglobin
hemoglobin bound to oxygen in a loose reversible way
paranasal sinus
one of several air-filled cavities in the maxillary, frontal, sphenoid, and ethmoid bones that is lines with mucous membrane and drains into the nasal cavity
pharynx
common passageway for both food intake and air movement; throat
pleura
serous membrane that covers the lungs and lines the walls of the chest and diaphragm
reduced hemoglobin
hemoglobin that is carrying hydrogen ions
residual volume
volume of air that remains in the lungs after normal exhalation
respiratory center
group of neurons in the medulla oblongata that regulates respiration
surface tension
force that holds moist membranes together when water molecules attract
surfactant
agent that reduces the surface tension of water; in lungs, prevents the alveoli from collapsing
tidal volume
amount of air that enters the lungs during a normal, quiet inspiration
tonsil
partly encapsulated lymph nodule located in the pharynx
trachea
windpipe
ventilation
breathing
vital capacity
maximum amount of air a person can exhale after taking the deepest breath possible
vocal cord
folds of tissue within the larynx that produce sounds when they vibrate