Human Body Systems

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Across
  1. 3. a complex network of nerves that includes the brain, spinal cord, and all the nerves throughout the body. Its primary function is to send messages back and forth between the brain and the rest of the body.
  2. 5. the system of bones, muscles, joints, cartilage, ligaments, and tendons that provides the body with support, stability, and the ability to move
  3. 6. the body system that transports molecules to and from all cells of the body
Down
  1. 1. the body system that takes in food and breaks it down
  2. 2. the system of cells, tissues, and organs that defends the body against germs like bacteria, viruses, and fungi, and other foreign substances
  3. 4. a system that removes waste products and excess water from the body to maintain internal balance
  4. 7. the body system that takes in oxygen and releases carbon dioxide