Sixth Grade
Worksheets
The Heart
Many people think of love when they think about their hearts. They might say, "I love you from the bottom of my heart." Sometimes people complain of having a broken heart when they are sad. A person who does something mean might be described as being heartless. Actually, your heart has nothing to do with your feelings. Your heart has a much more important job.
Your heart is a big muscle. It is about the same size as your fist. Like all muscles, your heart can "flex." It makes a squeezing motion when it flexes. Your heart does this over and over again. This is your heartbeat. Your heart beats to move blood to all the parts of your body. This process is called circulation. It takes less than a minute to move blood to all of the cells in your body! Blood is pumped to your lungs where it picks up oxygen from the air you breathe. Next, the blood is pumped from the heart to other parts of your body. The blood delivers oxygen to all your cells .....
