Exchange and transport

• How is a root hair cell adapted for exchanging surfaces?


  Large surface area which increases the rate of absorbtion of water and minerals
• how are alveoli adapted for exchange surfaces?

  large SA - increases rate of gaseous exchange

  Thin walls - Short diffusion distance

  Good blood supply and ventilation - large capillary network
• How is the small intestine adapted for exchanging substances?


  Lots of villi, increases the SA, increases the rate of diffusion of products of digestion.

  Thin walls allow for short diffusion pathway.
• Label the structures that make up the lungs.

  Lungs structure:

  A) Ribs

  B) diaphragm

  C) alveoli

  D) bronchioles

  E) bronchi

  F) trachae