Body Systems English

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Across
  1. 5. a complex network of organs, cells, and proteins that defends the body against infection, while also protecting the body's own cells
  2. 6. system pumps blood from the heart to the lungs to get oxygen
  3. 7. composed of bones, cartilage, ligaments, and other tissues that perform essential functions for the human body
Down
  1. 1. network of organs and tissues that help you breathe
  2. 2. consisting of skeletal, smooth, and cardiac muscle
  3. 3. organs that take in food and fluids and break them down into substances that the body can use for energy, growth, and tissue repair.
  4. 4. transmits signals between the brain and the rest of the body, including internal organs