Cells & Body Systems.

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Across
  1. 1. the basic unit of life
  2. 3. thick-walled blood vessels that take blood from the body away from the heart to the rest of the body
  3. 5. the system that supplies blood with oxygen from the outside air and removes carbon dioxide from your blood
  4. 7. a group of organs working together to perform a certain task
  5. 8. the system that breaks down food you eat into smaller pieces to be absorbed as nutrients
  6. 9. long extension of a neuron's cell body that transmits information to other cells next to it
  7. 11. specialized cells of the nervous system that receive and transmit information
  8. 12. neurons in the central nervous system that connect sensory neurons to motor neurons
  9. 14. division of the peripheral nervous system that controls automatic responses in the body, such as heat rate
  10. 17. the system that covers the surface of the body and internal organs (hint: think skin)
  11. 18. outer covering of a cell that provides strength and support- only found in plant cells
  12. 20. supports and connects different parts of the body
  13. 21. substance created by the body to carry out chemical digestion
  14. 22. the system that allows movement
  15. 24. transport system reaching every cell in the body that carries nutrients, blood, and waste
  16. 25. large muscle beneath the lungs that helps the lungs move air in and out of them
  17. 26. waste removal
Down
  1. 1. breakdown of large food particles into smaller pieces by enzymes
  2. 2. the system that removes chemical and gaseous wastes
  3. 4. the part of the nervous system that is composed of cranial and spinal nerves
  4. 6. the disease in the lungs that causes the growth of tumours, which take up space in the lungs, making breathing difficult
  5. 10. coordinates and controls all organs and organ system- manages stimuli
  6. 13. nerve that leads from the retina to the brain
  7. 15. the part of the nervous system composed of the brain and spinal cord
  8. 16. a group of tissues working together to perform a certain task
  9. 19. tiny blood vessels that connect arteries to veins
  10. 20. thin structure that encloses all the contents of plant and animal cells
  11. 23. two main branches of the trachea that lead into the lungs