21. Groove separating the atria from the ventricles externally 22. Major pumping organ of the cardiovascular system 23. Small conical projections on the inner surface of the ventricles 24. Fluid in the pericardial cavity 25. Connect the pointed ends of the flaps or cusps to the papillary muscles in the ventricles of the heart.

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21. Groove separating the atria from the ventricles externally
22. Major pumping organ of the cardiovascular system
23. Small conical projections on the inner surface of the
ventricles
24. Fluid in the pericardial cavity
25. Connect the pointed ends of the flaps or cusps to the
papillary muscles in the ventricles of the heart.
Transcribed Image Text:21. Groove separating the atria from the ventricles externally 22. Major pumping organ of the cardiovascular system 23. Small conical projections on the inner surface of the ventricles 24. Fluid in the pericardial cavity 25. Connect the pointed ends of the flaps or cusps to the papillary muscles in the ventricles of the heart.
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