Blood that is low in oxygen concentration and high in carbon dioxide concentration ...
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The lower airways or lower respiratory tract includes the portion of the larynx below the vocal folds, trachea, bronchi and bronchioles. The lungs can be
In order to draw air into its mouth the frog lowers the floor of its mouth, which
Lower part of the trachea; Pharynx 2. Bronchial tree
It is only in the lungs, however, that gas exchange occurs ...
diffusion will still occur very rapidly despite the lower partial pressure gradient.
The respiratory system of birds facilitates efficient exchange of carbon
increases vertical dimension of thoracic cavity > lowers air pressure in lungs ...
External Respiration Takes Place in the Alveoli. Click to play a ...