hierarchical of body system

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Across
  1. 2. A system that transports oxygen, nutrients, and hormones throughout the body.
  2. 5. A system that enables movement and maintains posture.
  3. 6. A group of cells that work together to perform a specific function.
  4. 7. A living individual which contains one or more cells.
  5. 9. The system responsible for transmitting signals between different parts of the body.
  6. 10. A system that brings in oxygen and expels carbon dioxide.
  7. 11. Organs that work together to defend the body against disease and infection
Down
  1. 1. A Group working together
  2. 3. the basic unit of life.
  3. 4. Part of the cell such as the nucleus
  4. 5. A group of two or more atoms held together by chemical bonds.
  5. 8. A system that breaks down food and absorbs nutrients.