What type of alveolar cells cover over 90% of the surface area of the alveolar-capillary membrane?

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Quizplus · Accepted Answer

Type I cells are thin, flat cells that make up over 90% of the surface area of the alveolar-capillary membrane, providing a large surface area for gas exchange. Alveolar macrophages are specialized immune cells that help to clear debris and pathogens from the lungs, while granular pneumocytes and type II cells secrete surfactant and help maintain the elasticity of the alveoli.

What Type of Alveolar Cells Cover Over 90% of the Surface