Respiratory system Flashcards
The respiratory system provides for _________.
air exchange
The respiratory system supplies tissues with _________.
oxygenated blood
The primary function of the lungs is _____________.
breathing in oxygen and exhaling carbon dioxide
Air flow thru the body….
Air is inhaled through the nose into the trachea, passing into the right and left bronchial tubes, into the alveoli, then transported by red blood cells into the bloodstream
Alveoli are….
tiny air sacs that are surrounded by capillaries
Alveoli do what?
permit the exchange of oxygen and carbon dioxide to occur
Tiny hairs within the bronchial tubes are called…
cilia
What does the diaphragm do?
A muscle that contracts and pulls air into the lungs during inspiration, when the diaphragm relaxes carbon dioxide is forced out of the body through expiration
The act of taking in oxygenated air
inspiration
Components of the respiratory system…
nose, pharynx, larynx, trachea, bronchi, lungs with their alveoli, diaphragm, and muscles surrounding the ribs
Respiration is controlled by…
the respiratory control center in the medulla of the brain
External respiration refers to….
the exchange of gases between the atmosphere and the blood through the alveoli
Internal respiration refers to…
the exchange of gases between the blood and the body cells
Exhalation is a _______ process
passive
Most of the oxygen carried in the blood is bound to __________.
hemoglobin in red blood cells
