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The Organization and Structure of the Human Body

The Organization and Structure of the Human Body

The human body is made up of a complex structure of systems that all work together. There are several levels of organization to this structure, with each level more complex than the last.

Grades

5 - 8

Subjects

Biology, Health

cell
noun

smallest working part of a living organism.

digestive system
noun

series of organs and glands responsible for the ingestion, digestion, and absorption of food. Also called the alimentary canal.

intestine
noun

tubular system in the human digestive system, which regulates elimination of waste products from the body.

nervous system
noun

cells, organs, and tissues including the brain and spine that respond to internal and external stimuli.

organ
noun

musical instrument made of pipes that release different sounds when a keyboard forces air through them.

tissue
noun

cells that form a specific function in a living organism.

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Director
Tyson Brown, National Geographic Society
Author
National Geographic Society
Production Managers
Gina Borgia, National Geographic Society
Jeanna Sullivan, National Geographic Society
Program Specialists
Sarah Appleton, National Geographic Society, National Geographic Society
Margot Willis, National Geographic Society
other
Last Updated

May 20, 2022

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