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Orientation to the Human Body



The human body is a complex organism. It is made of trillions of individual cells, all working together to perform the physiological functions of a living thing. Cells represent the basic unit of structure and function within the body. Different types of cells are arranged into layers called tissues, and tissues are arranged into organs. Multiple organs work together as an organ system to perform a specific function within an organism's body. There are eleven organ systems in the human body. These organ systems carry out many physiological processes. One fundamental process is the maintenance of homeostasis, a state of equilibrium within the system.

At A Glance