C) Basement substance in between the two mentioned above
D) All of the above
Explanation
Diffusion membrane is made up of three layers (i) Thin sequamous epithelium of alveoli. (ii) Endothelium of alveolar capillaries. (iii) Basement substance in between the squamous in epithelium of alveoli and endothelium of alveolar capillaries
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.