Body+Systems

//__ Body Journeys __// What I know about the body: Veins run all the way around your body. There are 25,000,000,000 red blood cells in the Average adult human body. You don't need your gall bladder and your tonsils. Your Nervous system is made up of brain and spinal cord and millions of nerve cells. The heart pumps blood at 260 mph. The blood goes to each artery and vein within a few seconds. The brain is made up of three parts: the Cerebrum, Cerebellum, and the medulla. The brain has a brain stem that connects to the spinal cord. Nerves can tell if something is to hot or to cold. Sometimes you move when you don't think about it like when you touch a hot pan you pull your hand back without even thinking. Sometimes nerves don't work properly like some people can't feel in there fingers like my grandfather can't feel anything in his pinkie finger or a friend of my mom can't feel in both his fingers. The muscles allow you to move parts of your body and keeps it together. Its really tight so bones don't go out of place. Cardiac is the muscle that makes the heart pump blood to all the parts of your body. Smooth muscles have different purposes like the stomach's smooth muscle helps holds and releases acid when food comes, but the intestines smooth muscle push waste to the urinary system. The immune system is in the exact same area as the circulatory system. The immune system use the veins and artery's to move the white blood cells to fight the germs. Nerves run in every known place to send messages or