Body Systems Vocabulary

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Across
  1. 7. The tubes in your circulatory system that carry your blood.
  2. 8. The tubes (blood vessels) that carry blood away from your heart. Most carry oxygen-rich blood.
  3. 9. The tubes (blood vessels) that carry blood back to your heart from your body. Most carry blood with lower levels of oxygen and higher levels of carbon dioxide.
  4. 10. The levels of structure in an organism, ranging from subcellular organelles to cells, tissues, organs, and organ systems.
  5. 13. The nerve cells (neurons) in your body that sense information from the world.
  6. 14. In a clinical trial, when someone has been told about the possible risks involved in the trial and they agree to participate.
  7. 15. Large molecules in food made of chains of fatty acids. It serves as a source of energy for the body.
  8. 16. Nerve cells (neurons) in your spinal cord and brain that connect to the sensory neurons.
  9. 17. The process in your digestive system of breaking apart your food into smaller and smaller pieces using physical processes such as chewing and the muscles contracting in your stomach.
  10. 19. One of the three macronutrients in food that provide energy. They provide the body with energy more quickly.
  11. 21. A group of organs that work together to perform a specific function.
  12. 26. An integrated system consisting of specialized organs responsible for the ingestion, digestion, and absorption of food.
  13. 29. The system that moves blood around your body. It includes your heart, blood vessels, and blood.
  14. 31. Nerve cells (neurons) that send signals from your brain to your muscles.
  15. 32. A collection of tissues that performs a particular function or set of functions.
  16. 34. Chemicals that an organism takes in from its environment to use as a source of energy or as building blocks for growth.
  17. 35. The smallest structural unit, enclosed by a membrane, that makes up all living organisms.
  18. 36. A tissue in your body that includes both cells and liquid materials.
  19. 37. The nerve endings in your skin that detect pressure on your skin.
Down
  1. 1. The nerve cells in your body. These include interneurons, motor neurons, and sensory neurons.
  2. 2. One of the three macronutrients in food that provide energy. It is used primarily for building tissues, such as muscle and bone.
  3. 3. The process in your digestive system of breaking apart your food into smaller and smaller pieces using saliva, acid in your stomach, and other substances inside your digestive system.
  4. 4. The two chambers of your heart (one on the left and one on the right) where blood leaves the heart.
  5. 5. The body system that collects information from your senses about your environment. It includes your brain, spinal cord, and nerves.
  6. 6. Specialized cells (nerve cells or neurons) or bundles of nerve cells in the human body that send messages within the nervous system. See nervous system.
  7. 8. Small sacs inside the lungs where oxygen and carbon dioxide are exchanged and moved into the blood.
  8. 11. A group of similar cells and cellular material that perform a particular function.
  9. 12. The body system that takes in oxygen and releases carbon dioxide. This system includes the nose, mouth, lungs, and the parts that connect them.
  10. 18. Tubes (blood vessels) that have walls so thin that oxygen, nutrients, and waste can pass through the walls into and out of the cells in your body, to and from your blood.
  11. 20. The two chambers of your heart (one on the left and one on the right) where blood enters the heart.
  12. 22. The rate of your heartbeat, which can be felt at your wrist, neck, and other places on your body.
  13. 23. Muscular sacs inside the chest that bring oxygen into the body and release carbon dioxide.
  14. 24. The process of breaking down food in the body.
  15. 25. The parts of an object or system, including what they are made of, their shapes, and their arrangement. The way that an organ or body part is made up, including its shape and the types of tissues or other substructures that form it.
  16. 27. Any representation of a system (or its components) used to help one understand and communicate how it works.
  17. 28. An organ in your circulatory system that pumps the blood in your body. It is made up of four chambers that work as two pumps.
  18. 30. The specialized activities performed by a system, organ, body part, object, or device.
  19. 33. Tests run on human volunteers to show that a new medicine or device is both safe and effective. Clinical trials are run before the new medicine or device is approved for use by the public.