Because if they were, then too much blood would fill the left atrium (lower left), and it would overflow, causing too much blood to flow through the veins which could result in them breaking.
State the valves of the heart and their
A heart murmur can be indicative of an abnormality with one of the heart valves, which can indeed cause fatigue.
The use of the valves in the heart is to have blood flow regularly through the heart. The valves pump blood out of the heart into the body.
The upper heart valves are called atriums, and the lower heart valves are called ventricles.
There are 2 valves in a sheep's heart. They are the mitral and tricuspid valve. The sheep also has a 4 chamber heart that is very similar to a human heart.
3 this answer is incorrect there are 4 valves in the human heart.
Valves can be found in the heart. They sit between the Atria and the Ventricles and help aid cardiovascular activity.
In the heart and valves
Valves can be found in the heart aswell as the veins
valves prevent the backflow of blood.
DESCRIBE THE ACTION OF HEART VALVES. WHEN DO THEY OPEN AND CLOSE?
In the heart and valves