The Respiratory System The network of air tubes spreading out just like the branches and twigs of a tree, form the structure of the lungs. The trachea, or windpipe, divides into two bronchi and t...
The mechanism of breathing and the anatomy of the organs that carry out this activity are brought vividly to life through revealing animation and x-ray motion pictures. Additional animation explain...
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فيديو عن الجهاز التنفسى للغات 
