Human Body Systems 8th Grade

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Across
  1. 2. The smallest unit of a chemical element that includes protons, neutrons, and at least one electron.
  2. 4. Infectious agent that is found everywhere, even in the human body. Can sometimes cause disease.
  3. 7. Microorganisms that live within a host.
  4. 10. Two combined systems that stabilize the body, provide mobility, and protect internal organs.
  5. 11. Smallest type of infectious agent that invades a host cell, duplicates, and destroys cells.
  6. 12. Formed by tissues coming together.
  7. 14. System that is responsible for fighting off infectious agents and keeping the body healthy.
  8. 15. System that consists of the lungs and is responsible for circulating oxygen and carbon dioxide in and out of the body.
Down
  1. 1. The body's ability to sustain a constant internal environment.
  2. 3. System that is responsible for making offspring.
  3. 5. System that includes the bladder, ureter, urethra, and kidneys.
  4. 6. System that begins in the mouth, and includes the esophagus, stomach, small and large intestines.
  5. 8. System that is the control center of the body and includes the brain, spinal cord, sense organs, and nerves.
  6. 9. System that pumps blood through the heart and moves oxygen throughout the body.
  7. 13. Infectious agent that includes yeasts, molds, and mushrooms. Can be unicellular or multicellular.