Spiny Cell Body, basement Membrane, Endothelium, Gas exchange, Pulmonary alveolus, epithelium, biological Membrane, Capillary, respiration, respiratory System, breathing, respiratory Tract

spiny Cell Body, basement Membrane, Endothelium, Gas exchange, Pulmonary alveolus, epithelium, biological Membrane, Capillary, respiration, respiratory System
spiny Cell Body, basement Membrane, Endothelium, Gas exchange, Pulmonary alveolus, epithelium, biological Membrane, Capillary, respiration, respiratory System, clipart
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