Diaphragm
/dˈaɪəˌfræm/
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Definition
(noun) In mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs.
Sentence Examples
The diaphragm is a muscle.
Hiccups are caused by spasms of the diaphragm.
CEFR Practice Quiz
The ____ is a muscle.