The mitral valve separates the left upper chamber (left atrium) and
left lower chamber (left ventricle) of the heart. The mitral valve is formed
from two downward-facing flaps.
- The valve opens when the heart relaxes,
allowing blood to flow from the left upper chamber into the left lower chamber
of the heart.
- The valve normally closes smoothly when the heart
pumps blood out of the left lower chamber to the body.
