Matching Pairs Respiratory systemOnline version read and complete by Ana Blas Pérez 1 bronchi (singular: bronchus) 2 trachea 3 lungs 4 alveoli (singular: alveolus) 5 bronchioles 6 ribs 7 intercostal muscles 8 diaphragm Small tubes that lead from the bronchi to the alveoli. The tube through which air travels from the mouth and nose to the lungs. Also known as the windpipe. A pair of organs through which air is moved in and out when we breathe. Muscles found between the ribs. They contract and relax to help move air into and out of the lungs Tiny air sacs arranged in clusters throughout the lungs. They provide a large surface area for gas exchange to take place. The bones that protect the organs in the chest. The two tubes that lead from the trachea into the lungs. A dome-shaped, flat muscle that sits underneath the ribcage. It contracts and relaxes to change the volume of the chest, causing the movement of air into and out of the lungs.
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