contraction of the cardiac muscle.
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EXAMPLES
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Subject:
a black substance that coats the lungs of a smoker, causing cancer of the respiratory tract.
Subject:
a group or category in the biological classification system (the plural of taxon is taxa).
Subject:
the practice and science of classification. This is the part of systematics that is only...
Subject:
(also called lithospheric plates) massive, irregularly shaped slabs of solid rock.