respiratory system

1. - type of protein that allows red blood cells to carry oxygen to other cells in the body
3. - allow oxygen from the air to pass into your blood
5. - art of your body that flops down over the windpipe when you swallow to keep food from going into your lungs
7. - large air tubes leading from the trachea to the lungs
8. - pushing the air you breathed in out of your body
11. chords - pair of folds of tissue that extend across the inside of the larynx and that produce the voice when air exhaled from the lungs causes them to tighten and vibrate
13. - he act of spreading or allowing to spread freely
14. - a group of skeletal muscles between the ribs

2. - part of the lung
4. - an organ in the neck of humans and animals.
6. - take in by breathing
9. - stiff-walled tube of the respiratory system that connects the pharynx with the lungs
10. - tough flexible tissue that makes up most of the skeleton of vertebrates
12. - baglike organs, or body parts, used for breathing
15. respiration - the process by which organisms use oxygen to break down food molecules to get chemical energy for cell functions