Gas Exchange

Description

GCSE Biology (Gas Exchange) Mind Map on Gas Exchange, created by 9arush on 11/08/2013.
9arush
Mind Map by 9arush, updated more than 1 year ago
9arush
Created by 9arush about 11 years ago
176
1

Resource summary

Gas Exchange
  1. Keywords
    1. Ventilation
      1. Bringing in fresh air & removing stale air.
        1. Maintaining concentration gradient
        2. Gas Exchange
          1. Process of swapping one gas for another
            1. Occurs in alveoli - where there are capillaries & tissues
            2. Respiration
              1. The production of ATP
                1. Occurs in the cytoplasm & mitochondria of cells
              2. The Mechanics of breathing
                1. Breathing in ( Inspiration)
                  1. External intercostal muscles contract
                    1. Ribs move upwards & outwards
                    2. Diaphragm contracts & moves down
                      1. Volume in chest increases
                        1. Air rushes into lungs & they inflate
                          1. Pressure decreases lower than atmospheric pressure
                          2. Breathing out (Expiration)
                            1. External Intercostal muscles relax
                              1. Ribs move downwards & inwards
                              2. Diaphragm relaxes & moves upwards
                                1. Volume in chest decreases
                                  1. Air rushes out of lungs & they deflate
                                    1. Pressure increases higher than atmospheric pressure
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