1. all the chemical processes by which cells produce the energy and substances necessary for life. Food is separated into the parts it is made up of to produce heat and energy, to repair tissues, and to help growth to happen -

2. to make an organized and determined attempt to deal with a problem, often a social problem such as crime or unemployment -

3. A structure in the human or animal body at which two parts of the skeleton are fitted together -

4. a path with a hard surface beside a road. The American word is sidewalk -

5. to become bigger and heavier -

6. to make pain or another bad physical feeling less unpleasant -

7. special glasses that protect your eyes, for example when you are using a dangerous machine or when you are swimming -

8. usually small board that is used to support the arms of a swimmer, used chiefly in practicing kicking movements -

9. an exercise in which a person, keeping a prone position with the hands palms down under the shoulders, the balls of the feet on the ground, and the back straight, pushes the body up and lets it down by an alternate straightening and bending of the arms -

10. a light brown colour -

11. a type of hormone produced in the body that reduces pain, especially when you are injured or physically tired -