Body systems

5. move or cause to move continuously or freely through a closed system or area
6. carries nerve signals from your brain to your body and vice versa
8. move or cause to move continuously or freely through a closed system or area
11. tiny hair-like extensions of cells sweeping particles out of the lungs
13. control or maintain the rate or speed of (a machine or process) so that it operates properly
18. force out or eject (something), especially from the body
19. act in such a way as to have an effect on another
20. chemical substances that act like messenger molecules in the body. After being made in one part of the body, they travel to other parts of the body where they help control how cells and organs do their work.
21. relating to an embryo.

1. filter substances that travel through the lymphatic fluid, and they contain lymphocytes (white blood cells) that help the body fight infection and disease
2. the process of infecting or the state of being infected
3. done without will or conscious control.
4. (of an organism or part) having or consisting of many cells
7. The muscular tube through which food passes from the throat to the stomach.
9. take or carry (people or goods) from one place to another by means of a vehicle
10. Located on top of both kidneys; produce hormones that help regulate your metabolism, immune system, blood pressure, response to stress
12. pass (a liquid, gas, light, or sound) through a device to remove unwanted material
14. filter waste materials out of the blood and pass them out of the body as urine
15. break down (food) in the alimentary canal into substances that can be absorbed and used by the body.
16. give assistance to; enable to function or act.
17. (of an object or structure) not likely to give way or overturn; firmly fixed.