Heart is a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines; “he drew a heart and called it a valentine.
There is a holiday that happens on February 14. It is the day of the year when lovers show their love to each other. This can be done by giving flowers, chocolates or Valentine’s cards or valentines coloring pages or heart coloring pages. Love notes can be given to one another. These notes are called valentines.
Symbols of Valentine’s Day are heart shapes, roses, and Cupid with his arrows.You can click on heart coloring pages then print them out.
The human heart has four chambers or closed spaces. Some animals have only two or three chambers.
In humans, the four chambers are two atria and two ventricles. Atria is talking about two chambers; atrium is talking about one chamber. There is a right atrium and ventricle. These get blood that comes to the heart. They pump this blood to the lungs. In the lungs blood picks up oxygen and drops carbon dioxide. Blood from the lungs goes to the left atrium and ventricle. The left atrium and ventricle send the blood out to the body. The left ventricle works six times harder than the right ventricle because it carries oxyginated blood.