Crossword 14

2. the line of bones down the middle of the back
4. a small, usually glass, container for a single measured amount of medicine, especially for an injection
8. a seam-like immovable junction between two bones, such as those of the skull
9. a dose of a vaccine that increases or renews the effect of an earlier one
10. a small knife with two cutting edges and a sharp point that a doctor uses when cutting the skin
11. a substance in red blood cells that combines with and carries oxygen around the body, and gives blood its red colour
13. a serious disease in which the body produces too many white blood cells
14. an aquatic or terrestrial annelid worm with suckers at both ends
15. a smooth, thick substance that is used on painful or damaged skin

1. a disease that makes your eyes and skin yellow
3. a device worn over the mouth and nose to prevent harmful substances from being breathed in
5. a reduction in the efficiency of a muscle or organ after prolonged activity
6. special waves used in such processes as examining organs inside the body and directing the route of submarines
7. the time when something unpleasant and difficult to control starts, such as a war or disease
8. a small piece of wood used by a doctor to hold someone's tongue down
10. a small lobe
11. conditions or practices conducive to maintaining health and preventing disease, especially through cleanliness
12. the thick viscous substance secreted by the mucous membranes of the respiratory passages, especially when produced in excessive quantities during a cold