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1.the movement of air into the lungs, breathing in.
3.a tube that connects the pharynx and larynx to the lungs.
5.one of the two channels of the nose.
6.consequence of the diaphragm rising higher, to accommodate the liver.
7.a thin sheet of muscle under the lungs.
9.Exhalation of breath, breathing out.
11.a large air filled space above and behind the nose in the middle of the face.
13.a hollow muscle that pumps blood throughout the blood vessels by repeated, rhythmic contractions.
14.a pathological condition in which the body or a region of the body is deprived of an adequate oxygen supply.
15.They serve to protect the lungs, heart, and other internal organs of the thorax.
16.the first portion of the alimentary canal that receives food.
17.a structure located on the brain stem.
18.a flat bone that lies in in the middle front part of the rib cage.
2.the biological system that introduces respiratory gases to the interior and performs gas exchange.
4.These air sacs are the forming and termination point of the respiratory tract.
8.the first passageways by which the air passes through the nose or mouth to the air sacs of the lungs in which branches no longer contain cartilage or glands in their submucosa.
10.manipulates pitch and volume
12.to filter, warm, and moisten air and conduct it into the lungs.

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