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Across 1. System that breaks down the food and absorbs nutrients 4. System that helps the body protecting from diseases 6. A group of cells that perform a single function 9. Sytem that is on skin, hair, nails,sweat and oil glands 10. A group of organs that perform closely related functions 13. An amount of 1000 calories 15. Chemical energy from the food when is broken down 16. System that is on hearth, blood vessels and blood 18. Is the basic unit of structure and function in living things 19. One of the fastest-growing health problems as a result of the failure of homeostasis in sugar levels 21. Describes the relatively constant physical and chemical conditions that organisms maintain despite changes in internal and external environments 22. Most important nutrient 23. Is the process in which stimulus produces a response that opposes the original stimulus. 24. System that supports the body, protects organs and contains cells that produce blood cells 25. A group of different types of tissues that work together to perform a single function or several related functions

Down 2. A tissue that has the function of protection, absortion and excretion of materials 3. A tissue that has the function of the voluntary and involuntary movements 5. A tissue that has the function of receiving and transmitting impulses 7. Include cells, tissues, organs, and organs systems 8. Produces chemicals that signal cells throughout thebody to speed up their activities 11. Is the amountof heat needed to raise the temperatur of 1 gram of water by 1 degree Celsius 12. System that brings oxygen needed for cellular respiration 14. Your body needs them to build and repair tissues 17. A tissue that os under the skin, surrounding organs, blood, bones 20. Produces bile, converts ammonia into urea and regulates sugar levels