1a:Cells make up tissues, tissues make up organs, and organs make up organ systems.
b: First, if you are hungry, you are thinking about what want to eat (nervous system). You decide that you want to make a sandwich. You stand up and go to the fridge and take all the ingredients that you want (skeletal and muscular system). When you’re finished, you make yourself comfortable and start eating. More of your saliva is excreted and you masticate and swallow (endocrine and digestive system). Between every bite, you breathe, but that is an unconscious function so you don’t pay attention to it (respiratory system.
c: To know what controls you and when you're pushing your systems too far and know what things we can eat and which we cannot
