Body Systems

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Across
  1. 3. billions of these finger-like projections are found in the small intestine and help absorb nutrients
  2. 6. the contractions of muscle around the esophagus which pushes food down to the stomach
  3. 9. blood vessels that carry blood away from the heart
  4. 11. this organ gets larger when you inhale (breathe in) and smaller when you exhale (breathe out)
  5. 12. blood that has lots of oxygen in it is this color
  6. 13. prevent the backflow of blood in the circulatory system
  7. 14. after air enters your mouth or nose, it does down this large tube towards your lungs
  8. 16. this substance is produced in the liver and stored in the gallbladder before it is released into the small intestine to help breakdown fat particles
  9. 17. part of the digestive system that does both mechanical and chemical digestion
  10. 18. most breakdown of food happens at this organ which has acid inside it
  11. 20. blood that does not have much oxygen in it is this color
  12. 21. any neuron that is sending a signal toward the brain is a __________ neuron (hint: the word starts with an “s”)
Down
  1. 1. this muscle (along with the rib muscles) help you breathe (it is seen in diagram 2)
  2. 2. the process that allows oxygen and carbon dioxide to exchange at the alveoli
  3. 4. this type of cell makes up all parts of the nervous system (the brain, the spinal cord, and nerves) It is seen in diagram 2
  4. 5. this organ is part of the excretory system and filters the blood
  5. 6. the nervous system is organized into two main parts: The central nervous system is made up of the brain and spinal cord and the ________ nervous system is made up of all the nerves
  6. 7. the name for the waste that gets stored in the bladder before it is excreted from the body
  7. 8. the part of the digestive system where water is absorbed out of the food passing through
  8. 10. these are fibers made up of neurons that send messages to and from the brain
  9. 15. there are many of these air sacs found in the lungs and are surrounded by capillaries
  10. 19. any neuron that is sending a signal away from the brain is a __________ neuron (hint: the word starts with an “m”)