This is a 5th grade informational text about how the human body is organized and how it functions. While reading, students should be able to quote accurately from a text when explaining what the text says explicitly and when drawing inferences from the text. Students should also determine two or more main ideas of a text and explain how they are supported by key details; summarize the text (License: https://creativecommons.org/licenses/by/3.0/us/).