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AP75 Chapter 1
Anatomy & Physiology
Term | Definition |
---|---|
Chemical | This level of organization includes atoms and molecules, the microscopic particles that are the building blocks of all living matter. |
Cellular | While all components of the human body are formed from atoms and molecules, the smallest unit of life capable of existing on its own is the Cells are considered the most basic functional units of the body. |
Tissue | a group of similar cells that work together to carry out one or more specific functions. Fat is an example of a tissue. Fat cells are bound together to form a tissue that insulates us from the cold, cushions delicate structures, and serves as a source of e |
Organ | a well-defined and organized group of tissues working together to accomplish a specific set of tasks for the body. For example, the heart has several different types of tissue that function together to pump blood throughout the body. |
System | a group of interrelated and inter- dependent organs that work together to accomplish a specific function or set of functions. For example, the digestive system is made up of the mouth, esophagus, stomach, intestine, and other organs that work together to c |
Organism | The entire human organism, the highest level of complexity, is an integrated structure made up of various systems, organs, tissues, and cells. Each level of organiza- tion is functionally linked to the next, making each essential to our health and well-be |