Gaseous Exchange

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  • Created by: Uswa
  • Created on: 23-03-13 15:14
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  • Gaseous Exchange
    • Lungs
      • In the THORAX (the upper part of the body)
      • Separated from ABDOMEN (lower part of body) by DIAPHRAGM
    • To make air move INTO lungs
      • Ribcage CONTRACTS and moves out & up
      • Diaphragm becomes FLATTER
      • Volume of thorax INCREASES
      • Pressure decreases
    • To make air move OUT of lungs
      • Ribcage RELAXES  and moves in & down
      • Diaphragm   RELAXES and becomes dome-shaped
      • Volume of thorax DECREASES
      • Pressure increases
    • Adaptations
      • Surface area of lungs and small intestines is increased by VILLI
      • Villi provide a large SURFACE AREA with an extensive netword of CAPILLARIES
        • To absorb the products of digestion by diffusion and acitve transport
  • Breathing system takes air into and out of the body
    • Gaseous Exchange
      • Lungs
        • In the THORAX (the upper part of the body)
        • Separated from ABDOMEN (lower part of body) by DIAPHRAGM
      • To make air move INTO lungs
        • Ribcage CONTRACTS and moves out & up
        • Diaphragm becomes FLATTER
        • Volume of thorax INCREASES
        • Pressure decreases
      • To make air move OUT of lungs
        • Ribcage RELAXES  and moves in & down
        • Diaphragm   RELAXES and becomes dome-shaped
        • Volume of thorax DECREASES
        • Pressure increases
      • Adaptations
        • Surface area of lungs and small intestines is increased by VILLI
        • Villi provide a large SURFACE AREA with an extensive netword of CAPILLARIES
          • To absorb the products of digestion by diffusion and acitve transport

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