Final answer:
The left atrioventricular valve, also known as the mitral or bicuspid valve, is situated between the left atrium and left ventricle. It consists of two tissue flaps, ensuring one-way blood flow within the heart.
Step-by-step explanation:
The left atrioventricular valve, commonly known as the mitral valve or bicuspid valve, is located between the left atrium and the left ventricle. The mitral valve plays a crucial role in the cardiovascular system by managing blood flow through the heart's chambers. Structurally, it is comprised of two cusps or flaps of tissue, which are distinctly different from the tricuspid valve that has three flaps and is found on the right side of the heart. These flaps are anchored to the ventricle wall by chordae tendineae that are, in turn, connected to two papillary muscles.
This construction allows for regulated blood flow between the upper left chamber (the left atrium) and the lower left chamber (the left ventricle) of the heart, preventing backflow and maintaining efficient circulation.