The respiratory and circulatory systems bring oxygen and nutrients to the cells. sinus. nose. mouth. epiglottis. trachea. lungs. The respiratory system is where gas exchange occurs. picks up oxygen from inhaled air expels carbon dioxide and water. Air exhaled. Air inhaled.
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The respiratory and circulatory systems bring oxygen and nutrients to the cells.
The respiratory system is where gas exchange occurs.
Muscles contract and
rib cage expands.
rib cage relax.
and moves downward.
Breathing in driven by the diaphragm and muscles of the rib cage.
(Hair filters dust)
(voice box with
(long, straight tube
in chest cavity)
(Suspended in chest cavity bounded by ribs)
(Tiny air sacs surrounded by capillaries)
Oxygen and carbon dioxide are carried by the blood to and from the alveoli.
Lung diseases reduce airflow and oxygen absorption.