Our bodies are made up of cells, which can group together to make tissue. Several types of tissues make organs, which all of the organs make up the organ system which then make up the human body!! :-)
Adaptations are features that help you survive, like if you have gills you won't be able to survive on land. They are also things that you get used to so you can survive also like we got used to the weather but if we go to Antarctica we will probably die because we aren't used to the weather.