Examlex
Draw the structure of a porphyrin ring system,and list three common,naturally-occurring molecules which contain a porphyrin-like ring system as part of their structure.
Respiratory Membrane
The thin barrier in the lungs through which gas exchange between the air in the alveoli and the blood in the capillaries occurs.
Gas Exchange
The biological process through which gases (such as oxygen and carbon dioxide) are transferred between the blood and the external environment in the lungs.
Alveolar Ventilation
The process by which air moves in and out of the alveoli, the tiny air sacs in the lungs, allowing for gas exchange with the blood.
Tidal Volume
Volume of air that is inspired or expired in a single breath during regular, quiet breathing.
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