We have been looking at the chambers of the heart this morning. This is a bi section of the Left side of the heart. Clearly on display is the atrio-ventricular valve that separates the two chambers. The valve only allows blood to flow in one direction, thus enabling the heart to act as a pump, moving blood from atrium to ventricle to vessel. The chordinae tendinae (heart strings) prevent it turning inside out. In the ventricle we can see the muscle wall is thick to contract strongly, reducing the volume and increasing the pressure in the chamber. The blood is forced past the semi lunar valves and into the aorta, shown here.
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