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Across 1. a sugar having several optically different forms 6. affecting the heart and blood vessels 9. a reverse movement or tendech 12. a particular section of food to improve a persons physical condition 13. bodily or mental exertion for improving and to stay healthy 14. in good physical condition and health 15. the fluid that circulates in the principal vascular 17. oxygen to muscle tissue during increased physical effort 18. harm or damage to the body 19. great or marked ability to do or act - strength or might 20. to draw out or extend a limb or a part of the body to fool extent

Down 2. the ability or strength to continue even whilst fatigued 3. a colourless and incombustible gas 4. a structure composing the skeleton 5. cells or fibres that produce movement to the body 7. engaged in action - work, participation etc 8. rapidity in moving or traveling. 10. involving or requiring free oxygen 11. an organ of blood located in the chest between the lungs 16. the positions of limbs or the carriage of the body