Hierarchical organization of interacting systems

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Across
  1. 4. A part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.
  2. 5. A system helps maintain the composition of bodily fluids within your body by excretion.
  3. 6. The environment where organisms interact with one another.
  4. 7. The building blocks of life
  5. 10. A system that consists of muscle fibers that are responsible for movements.
  6. 11. A system that includes the largest organ in the body which acts as a barrier to protect your body.
Down
  1. 1. A command system that assists with the communication within your body through electrical and chemical means.
  2. 2. When your body balances the biological system while adjusting to changing external conditions.
  3. 3. A system of organs and tissues that help you breathe.
  4. 5. A command system that controls the release of different hormones and works closely with the nervous system.
  5. 8. A system that supports your body structure and produces blood cells.
  6. 9. A group of cells that have a similar structure and that function together as a unit.