1. large surface area for gaseous exchange increases rate of diffusion.
2. moist surface for better diffusion of gases.
3. it contains a vast network of blood vessels which makes respiratory transport of gases through the blood via the alveoli much rapid
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1. There are alveoli in lungs which increase the surface area and speeds up theĀ  gaseous exchange.
2. The alveoli are supplied with large network of blood vessels to ease up the diffusion process.
3. It is moist and moist condition helps in faster diffusion.