You body Your body is not only amazingly complicated but also an amazing machine. Your body is made up of hundreds of different organs, bones, tendons, tissues, and millions of microscopic cells with each particular job to do to make your body operate and keep you alive. So, you have dozens of body parts and a lot of substances. And here are the main ones: body organs, body tissues, body fluids, water. Body tissues include of fat, bones and muscles. Your body fluids contain water, blood, tears and stomach juices. Blood seems as the most important one. Water makes up 70% you body. It is found in blood, and in and around the cells that make up your body.