A body system is a group of organs that work together to perform a specific function. The human body has 11 body systems. The systems studied in elementary school are usually the circulatory system, respiratory system, muscular system, digestive system, and immune system. The other systems are just as important but more complex, so they are studied at higher grade levels. This Google Slides presentation has links to videos for each body system. The body systems included in this presentation incl