Biology Breathing system

  • Intercostal muscles

    The intercostal muscles contract which moves the rib cage up and out
  • Period: to

    Biology Breathing system

  • Diaphram

    The diaphram muscle flattens and moves down
  • Effect of muscles

    becuase the musclcles move this increases the volume in the chest.
  • Air Movement

    Becuase there is a lower pressure within the chest than the outisde air, air rushes into the lungs.