The human body is a machine that can work "forever". Why we can't live forever?

well the cells don't live forever like the computer battery cells, they wear out and then die. we can change them, but it's diffrent for the human cells they live for some time then they die, they could be replaced when the other cell divides, or it could be empty for the rest of the life.

there more anatomy fact to be continued being discovered, but lets not get too much into the body, but how the body works when where in motion?

when your body is in motion five systems are working! the first three basic systems are muscular,skeletal, and nervous.

The skeletal:Well you probably heard about bones.bones they are most basic part of the body which you know about since you’re six. The bone is the body part which does three functions at one time! The first function the bones do, which make the body we see the same as we see. Without the bone we would be a blob of organs and skin. In our body we have more than two hundred bones to control all our weight so you wouldn't become an a blob of meat, it’s like the steel bars holding the skyscraper. The second thing the bones do is ... defending you! Like when did someone hit you in chest, did it hurt? Well yes, but it would be alot more painful without bones. Nature had worried about people and made bone harder than steel.The third thing it does is it helps us move, the places where the bones meet there are ligaments which is connected to bones, with the ligaments there is joints so bones could move. Ligaments hold the bones and the joints move the bones.

the muscles:Next up is the most powerful powerful parts of our body here it comes... Muscles! The muscles are all over our body they even in your fingers(there not muscles but ligaments). When we move part of our body, some of our muscles start contracting but others are relaxing. We have three muscles types cardiac, voluntary(skeletal) and involuntary muscles. All the muscles are different because of their structures and how they work. The cardiac muscle can work forever until it will be weaken. The voluntary muscles can’t work without our commands or nerve system. The involuntary muscles work without any command but they need minerals to work. But only one thing connects them, all of them need glucose, glucose is proteins wich trap the sugar and oxygen.

the nervous:Then the king of the moving system is!.......... The BRAIN! To start moving our voluntary muscles the brain sends an a electric surge down the spiral cord and then down the nerve to move the muscle. It's like an a robbery in a bank(brain), then the police goes after the robber down the main street(spiral cord), and then go down the street until the end of the street(nerve channel) . The most important part in the nerve system is spiral cord and brain. The nerve channels are not that important, because if it would break, only one part of our body would not move. Also if you would like to know, there is two types of death, the death which comes if your brain stops working and the death were your heart stops beating. And if you would break the spiral cord near the legs or near your waist you couldn't move your legs, but if it would be near the neck you couldn't move your whole body!

then there are respritary system and circulatory systems, if one of them would stop working the whole body would be dead after ten seconds!(I'm not for sure but if you will hold your breath for one minute, your dead.)the circulatory and respritary system is the most important system in our body. the circulatory system carries nutritients and oxygen around our organs, muscles, and to the heart. the heart is like the, pumping machine which pumps all the blood around our body. so all the blood would not be an a puddle of blood in our legs, blood vessels(which are muscles) in which the blood goes around the body to all the organs and muscles. there are three types of blood vessels, the arteries, capillaries, and veins. the arteries are something like an a railway in our body which carries all the blood to the stations of blood vessels. then there are the capillaries which carry the nutritients and oxygen to the organs and muscles. then the veins, which carry the poor oxygen blood to the heart and also the waste.

then is the respritary system which gives us oxygen. the lungs which are like some kind of a space ship with millions of rooms to which the oxygen goes to the flow of the space river. into the heart an into the body. how does the oxygen goes to lungs?.the air goes throught the noes with the special air filters which are hair in nose. and also with the cleaners, goblet cells which release muck called mucus and then gotten out by hair called cilia throught the mouth(?)