March 5th, 2008
From the 4 presentations I heard today I learned many things about the heart. Somethings I didn't even know. For example, the heart can beat about 80 times per minute and if you take care of your heart then it can beat for 4 billion and 800 million times in 100 years. I also learned that your heart is in the middle of your chest. The blood from your lungs enters through the left side of your heart. The blood that the heart pumps to the lungs is oxygen. It also pumps oxygen to cells and brings carbon dioxide away from the cells. I almost forgot, the heart belongs to the circulatory system. Well that is many things I've learned. Bye!