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Across 1. feedback in which the body reacts to enhance original stimulus 6. study of diseases of the body, and the functional changes associated with 8. study of how the body function 13. system of glands, produces hormones that regulate body functions 14. organic macromolecule 17. this system contains the bladder, kidneys, etc; extracts and excretes waste 19. simplest chemical 20. system that contains bones, ligaments; protects, supports us 21. number of organ systems we have 23. group of organs that contribute to a certain body function

Down 2. two or more tissues combined to form a structure that performs a specific function 3. system that contains skin, and serves to protect us 4. system which includes lymph glands and vessels; destroys pathogens and returns tissue fluid to circulatory system 5. state of "balance" within the body; maintains stability 7. system containing the lungs, trachea; exchanges oxygen and carbon dioxide 9. system containing the stomach, intestine, etc; breaks down food and extracts nutrients 10. system containing muscles, tendons; produces heat, moves us 11. contains ovaries, testes and several other organs 12. feedback in which the body reacts to diminish original stimulus 14. system includes heart, blood vessels, blood; transports nutrients, oxygen 15. system collects and interprets sensory information, regulates body functions; containing spinal cord, brain 16. makes up elements; combines to form molecules and compounds 18. study of body structure 22. smallest living functional and structural unit; made of organic macromolecules