Body Systems

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Across
  1. 5. a system that transports blood and other fluids into open spaces that surround organs in the body.
  2. 7. special structures in all parts of the sensory system that detect stimuli.
  3. 10. the upper two chambers of the heart.
  4. 11. the basic functioning unit of the nervous system; a nerve cell.
  5. 15. specialized plant tissue composed of tubelike cells that transports water and nutrients in some plants.
  6. 17. involuntary muscle named for its smooth appearance.
  7. 19. a process in which food is physically broken into smaller pieces.
  8. 20. the tissue that connects bones to other bones.
  9. 23. a tube that is held open by C-shaped rings of cartilage; connects the larynx and the bronchi.
  10. 24. the main organs of the respiratory system.
  11. 25. a group of different tissues working together to perform a particular job.
  12. 26. muscle found only in the heart.
  13. 29. the part of an organism that gathers, processes, and responds to information.
  14. 30. a group of similar types of cells that work together to carry out specific tasks.
  15. 31. a type of vascular tissue that carries dissolved sugars throughout a plant.
  16. 32. the system that collects and eliminates wastes from the body and regulates the level of fluid in the body.
  17. 34. the part of your nervous system that detects or senses the environment.
  18. 36. a large muscle below the lungs that contracts and relaxes as air moves into and out of your lungs.
  19. 38. system made of sensory and motor neurons that transmit information between the central nervous system (CNS) and the rest of the body.
  20. 39. a vessel that carries blood toward the heart.
Down
  1. 1. a tiny blood vessel that delivers supplies to an individual cell and takes away waste materials.
  2. 2. strong body tissue that can contract in an orderly way.
  3. 3. a tubelike passageway at the top of the throat that receives air, food, and liquids from the mouth or nose.
  4. 4. a group of organs that work together and perform a specific task.
  5. 6. a part of food used by the body to grow and survive.
  6. 8. system made up of the brain and the spinal cord.
  7. 9. the lower two chambers of the heart.
  8. 12. a process in which chemical reactions break down pieces of food into small molecules.
  9. 13. a type of vascular tissue that carries water and dissolved nutrients from the roots to the stem and the leaves.
  10. 14. where two or more bones meet.
  11. 16. the process by which cells become different types of cells.
  12. 18. a tubelike structure of neurons that sends signals to and from the brain.
  13. 21. a thick, hard outer covering; protects and supports an animal’s body.
  14. 22. a vessel that carries blood away from the heart.
  15. 27. microscopic sacs or pouches at the end of the bronchioles where gas exchange occurs.
  16. 28. a small opening in the epidermis, or surface layer, of a leaf.
  17. 33. the mechanical and chemical breakdown of food into small particles and molecules that your body can absorb and use.
  18. 35. a muscular tube that connects the mouth to the stomach.
  19. 37. two narrow tubes that carry air into the lungs from the trachea.