We need our heart because it pumps blood through our body. When it does, the blood goes to all the body so every part gets all the blood that is nesessary.
i love alot of things but the thing i love the most it SWIMMING :D i love it because its hard and keeps you fit and heathy!!! i swim 6 times a week and i am happy every time i do swim!!!!! :D
i like this website because it is very good with everything to do with space and have alot on mars and tells you alot and it is very detailed. this website also has many good pictures of mars
i think this website is good because it tells me all about mars and the important thinks about it and good facts i need to no if i will live on mars and it has really good pictures of mars and diffrent angels.