Limiting Water Loss

Attachments:

• Gaseous Exchange

1. Humans
   1. moist surface of Alveoli
2. Plants (Xerophytes)
   1. Stomata can close
      1. Guard Cells become Flaccid
   2. Waxy Cuticle reduces evaporation rate
   3. Curled Leaves with Stomata in pits trap moist air and protect from wind
   4. Epidermis Hairs trap moist air
   5. reduced Stomata numbers so fewer places for water to escape
3. Insects
   1. Spiracles can close
   2. Waxy Cuticle all over body is waterproof
   3. Hairs around Spiracles reduce evaporation
   4. air in Trachae has high conc of water vapour