b'Human Body SystemsChapterAs a first aider, it is necessary to have a basic understanding of the human body and how it works.The human body consists of a network of systems that are made up of organs and structures that are adapted to perform specific functions. The systems do not work independently, but rely on other body systems in order to function properly.Your body is like a big city with many different factories, only much more efficient. It is made up of many smaller parts, each with a specific job. The smallest living parts of your body are the cells. These are like tiny factories that continuously work day and night to keep you alive and healthy.Having knowledge of basic human anatomy will give you better understanding when injury or illness arises.18 How Your Body Works'