How your heart beats is it has 2
sides broken in half. They work together for certain things. The top half is
called atrium. The bottom half is called ventricle. When the two works together
they will pump blood from different directions to different directions for the
heart to beat. The sound you hear from your heart is likely this sound “lubb-dub.”
Do you know how big your heart is? If you are an adult, your heart is almost as big as your tight fist. A child’s heart is almost as big as their fist. A child’s heart beats faster than adult hearts. A canary’s heart beats faster than you probably even think it does.