Health ed

1. - Tiny air sacs at the end of the bronchioles
4. mass of nerve tissue that acts as the control center of the body
6. is a fibrous connective tissue which attaches muscle to bone
8. each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn
10. microtubule-based hair-like organelles that extend from the surface of almost all cell types of the human body
12. of the pieces of hard whitish tissue making up the skeleton in humans and other vertebrates
14. - the liquid component of blood that carries blood cells and dissolved materials
16. a blood protein produced in response to and counteracting a specific antigen.
17. - the smallest living part of the body
19. system- carries messages to and from the brains and spinal cord and all other parts of the body
22. neurons- carry responsing impulses to muscles and glands form the brain and spinal cord
24. branching fibrs that reviefe impulses and carry them to the cell body
25. a small colorless disk-shaped cell fragment without a nucleus, found in large numbers in blood and involved in clotting
26. a colorless fluid containing white blood cells, which bathes the tissues and drains through the lymphatic system into the bloodstream.

2. hollow part or cavity in an organ.
3. the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus
5. an abdominal organ involved in the production and removal of blood cells in most vertebrates and forming part of the immune system
7. pressure - is the pressure of circulating blood against the walls of blood vessels
9. - a body part consisting of several kinds of tissue that do a particular job.
10. of the fine branching blood vessels that form a network between the arterioles and venules
11. blood cell - part of the body's immune system
13. - a slimy substance, typically not miscible with water, secreted by mucous membranes and glands for lubrication, protection, etc
15. cord - A column of nerve tissue that runs from the base of the skull down the center of the back.
17. - the part of the brain that controls and coordinates muscle activity
18. - a point at which parts of an artificial structure are joined.
20. marrow- a soft fatty substance in the cavities of bones, in which blood cells are produced
21. a hollow muscular organ that pumps the blood through the circulatory system by rhythmic contraction and dilation
23. body - the main body of the neuron
27. rate- the number of heartbeats per unit of time, usually per minute