Across
- 5. a complex network of organs, cells, and proteins that defends the body against infection, while also protecting the body's own cells
- 6. system pumps blood from the heart to the lungs to get oxygen
- 7. composed of bones, cartilage, ligaments, and other tissues that perform essential functions for the human body
Down
- 1. network of organs and tissues that help you breathe
- 2. consisting of skeletal, smooth, and cardiac muscle
- 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. transmits signals between the brain and the rest of the body, including internal organs