Respiratory System

4. A special leaf-like piece of cartilage closes the opening into the larynx
6. The process that moves air in and out of the lungs
7. The drawing in of a substance into the lungs
8. The movement of molecules from an area of high concentration to one of low concentration
10. The movement of air between the environment and the lungs via inhalation and exhalation
12. The primary organ of respiration
13. A hollow muscular organ forming an air passage to the lungs, the voice box
14. Also known as a windpipe, the bony tube that connects the nose and mouth to the lungs

1. The large air tubes leading from the trachea to the lungs, carrying air to the lungs
2. The movement of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction
3. Consists of two nostrils and is located on the face
5. Tiny hair like structures that filters the nose
6. The passageways by which air passes through the nose or mouth to the alveoli of the lungs
9. A muscle that is at the bottom of the ribcage which assists the lungs
11. A condition in which the air sacs of the lungs are damaged and enlarged, causing breathlessness