7.5 Respiratory System Flashcards
pulmonary artery
carries deoxygenated blood from the right ventricle to the lungs
pulmonary vein
carries oxygenated blood from the lungs to the left atrium
pulmonary capillaries
surround the thin tissue membranes of the alveoli, is the site of gas exchange in blood
alveoli
air sacs in the lungs that are surrounded by a network of capillaries and provide space for gas exchange
nasal mucosa
warms, filters and moistens the air
pharynx
the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus
internal respiration
gas exchange between the bloodstream and the cells of the body
inhalation
the act of taking in air as the diaphragm contracts and pulls downward
exhalation
the act of breathing out as the diaphragm relaxes
whooping cough
also known as pertussis, a bacterial upper respiratory infection characterized by uncontrollable coughing
cystic fibrosis
a genetic disorder that affects both the respiratory and digestive systems
asthma
a chronic disorder characterized by episodes of breathing difficulty due to constricted, narrowed, or obstructed airways
larynx
the hollow muscular organ forming an air passage to the lungs and holding the vocal cords, also known as the voice box
external respiration
gas exchange between the lungs and the blood
epiglottis
a flap of cartilage that covers the trachea while swallowing