When I was in school, I hated science and remember thinking that the circulatory system was the most boring topic ever invented. The boys in the class liked the blood and guts aspect of it, but I was never intrigued by any of it. It was only when I started helping my kid with his homework that I found the subject interesting. Turns out, the circulatory system is fairly awesome, as long as it is taught correctly. Fortunately, my son has a better teacher than I did. The way she teaches internal anatomy is engaging and fun, basically the complete opposite of how I was taught!
The circulatory system is one of the most important systems in your body. At the center of your circulatory system is the heart. From there, blood vessels carry blood through your entire body. The blood carries the oxygen and nutrients to every place in your body. Then on its way back it picks up all of the waste that is left over so your body can get rid of it. The branches of blood vessels are both small and large, and if you were to string them all together end to end, they would circle the globe 2.5 times. See, I told you the circulatory system was cool!
There are plenty of other fun facts related to the circulatory system. For example, over the course of a year your heart will beat around 30 million times. Even cooler, if you're an adult your heart will pump around 4,000 gallons of blood every day. If you're a three year old, you only have two pints of blood in your entire body. If you're an average sized adult, on the other hand, you've got at least 10 pints of blood to carry around. There's so much to learn about the circulatory system, it's really a fascinating section of your body.
