Exchange of gases in the lungs

HideShow resource information
  • Created by: Chris
  • Created on: 02-01-13 18:05

Essential features of exchange surfaces:

  • They have a large surface area to volume ratio to speed up the rate of exchange 
  • They are very thin, keeping the diffusion pathway short so materials can cross rapidly 
  • They are partially permeable allowing selected materials to diffuse easily 
  • There is movement of the internal medium (blood) to maintain a diffusion gradient

Role of alveoli in gas

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Cellular processes and structure resources »