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Across 1. carries impulses back and forth to the brain from the body 8. A bundle of nerves that begins at the brain stem and continues down the center of the back. It connects with nerves outside the central nervous system and controls reflexes and directs sensations to the brain. 12. An ancillary organ of the digestive system that produces bile which is used by the body to break up fat particles. 14. The dome-shaped muscle that aides in the breathing process 20. The main role of this system is to provide gas exchange between the blood and the environment 21. The organ where water is absorbed from the food and taken into the bloodstream; prepares the remaining food material for elimination from the body 22. A group of specialized cells that work together to perform the same function 24. The main role of this system is to provide movement. 25. The transport tube that carries chewed food to the stomach 27. Tubes that move air from the trachea to the lungs 28. The main role of this system is to provide support for the body, to protect delicate internal organs and to provide attachment sites for the organs. 30. A group of two or more organs that work together to perform a specific function for the human body 32. helps with balance and coordination 33. two or more different types of tissues that function together to perform a specific function 34. a short tube that stores solid waste until it is eliminated from the body through the anus. 35. a disease that results in the glucose, or sugar, level of the blood being higher than the normal range. It is caused by a person’s inability to either produce or use properly a natural chemical produced in the body called insulin 36. Begins to break down food into smaller pieces through mechanical digestion; saliva in the mouth starts the process of chemical digestion 37. An ancillary organ to the digestive system that functions to produce enzymes that help break down starches, proteins, and fats in the small intestine.

Down 2. The main role of this system is to filter out cellular wastes, toxins and excess water or nutrients from the circulatory system. 3. Covers the body and prevents the loss of water; it protects the body from infection and injury; it helps to regulate body temperature, get rid of wastes (sweat), receive information from the environment and produce vitamin D. 4. covers the surfaces of the body, inside and outside 5. Voluntary muscles that are attached to bones and provide the force needed to move your bones 6. connects all parts of the body and provides support 7. Collects air from the environment and moistens and heats the air before it enters the trachea 9. Involuntary muscles that control many types of movement in the body (i.e., digestion) 10. An ancillary organ to the digestive system that functions to store bile produced by the liver. 11. A network of nerves that branch out from the spinal cord and connect to the rest of the body 13. The main roles of this system are to breakdown and absorb nutrients that are necessary for growth and maintenance. 15. contracts and shortens, making body parts move 16. these are the sells that make up nerve tissue 17. Involuntary muscle that forms the heart 18. The organ where most of the chemical digestion of food takes place; nutrients from food are also absorbed through here 19. The main role of the this system is to provide support for the body, to protect delicate internal organs and to provide attachment sites for the organs. 23. An organ of the central nervous system which has three distinct parts that all serve to control and coordinate the body’s activities 26. controls thoughts, voluntary actions, and the sensations related to the five senses 27. located at the base of the brain and controls vital and involuntary processes, for example, breathing, the beating of the heart, and digestion. 29. The major organs of the respiratory system 31. The windpipe; moves air from the nose to the lungs