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Across 5. a pain that occurs in any part of the body 6. we use it to measure how long it takes to do something 7. something done, felt, or thought in response to a situation or event. 10. we breathe it in and keeps us alive 12. the red liquid that circulates in the arteries and veins of humans 14. a hurt that happens in the body 17. of a system or machine achieving maximum productivity with minimum wasted effort or expense. 18. a strict ray of food that is healthy 19. successfully bring about or reach a desired objective or result by effort, skill, or courage. 20. a hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation

Down 1. a flavorous subsense that comes from a tap 2. a point at which parts of an artificial structure are joined. 3. the condition of being protected from or unlikely to cause danger, risk, or injury. 4. relating to or denoting exercise taken to improve the efficiency of the body's cardiovascular system in absorbing and transporting oxygen. 8. able or likely to shatter violently or burst apart. 9. the organization of the different elements of a complex body or activity so as to enable them to work together effectively. 11. any of the pieces of hard whitish tissue making up the skeleton in humans and other vertebrates. 13. having well-developed muscles. 15. being fast in time and can run fast 16. being healthy and can run ect