Gas-exchange system - lungs

HideShow resource information
View mindmap
  • Structure of human gas-exchange system
    • Trachea
      • Flexible airway that is supported by rings of cartilage that prevent the trachea collapsing as the air pressure inside falls when breathing in.
      • Walls are made up of goblet cells that produce mucus which traps dirt particles and bacteria from air breathed in.
      • The Cila removes mucus up the throat where it is digested through the body.
    • Bronchi
      • Two divisions of the trachea that each lead to the lungs
      • Like the trachea, it traps dirt particles by producing mucus
    • Bronchioles
      • Series of branching subdivisions
      • Walls lined with a muscle that contains lots of epithelial cells. This allows them to constrict so that they control air flow in and out.
    • Alvelio
      • Minute air-sacs at the end of the bronchioles
      • They spring back during breathing out in order to expel carbon dioxide rich air.
      • The membrane is the gas-exchange surface.
  • The Cila removes mucus up the throat where it is digested through the body.

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Biological molecules, organic chemistry and biochemistry resources »