Simple Squamous Endothelial Tissue

a nucleus of a cell forming the alveolus wall

b nucleus of a cell forming the capillary wall

c red blood cells inside capillary that will carry exchanged gases between the lungs and blood

d cell that forms the large circle of simple squamous forming the alveolus.

found: line lungs; line blood vessels (endothelium)
function: adapted for osmosis, diffusion and secretion

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