body systems

2. an elongated fiber that carries impulses away from the cell body to the dendrites of another neuron
5. the part of the brain that controls and coordinates muscle activity
7. is a thin tissue that covers bone and contains nerves and blood vessels
8. two tubes through which air moves to the lungs
10. a fluid that helps soften food so that it can be swallowed more easily
11. a dome shaped lesion that contains pus consisting of white blood cells, dead skin cells and bacteria
13. tough tissue fiber that attaches muscles to bone
16. microscopic air sacs

1. a protein that helps regulate chemical reactions
3. a pale yellow liquid composed of water salts and other waste products
4. the liquid component of blood that carries blood cells and dissolved materials
6. a structure that filters and destroys pathogens
9. a hormone that regulates blood sugar levels
12. tube that allows urine to pass through the body
14. small fold in the lining of the small intestine that increase the surface area and allow more food to be absorbed
15. is the oil produced by sebaceous glands