Examlex
Name and give the function of four vitamins needed by the body.
Premature Ventricular Contractions
Early heartbeats originating from the ventricles of the heart, experienced as a palpitation.
Tricuspid Valve
A valve in the heart between the right atrium and right ventricle that prevents backflow of blood during ventricular contraction.
Mitral Valve
A valve in the heart that lies between the left atrium and left ventricle, ensuring one-directional blood flow within the heart.
Atria Contracting
The phase of the cardiac cycle where the atria of the heart contract to move blood into the ventricles.
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