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Gas exchange - Coggle Diagram
Gas exchange
Gas exchange in single celled organism
no special exchange surface
Simple diffusion across their outer surface membrane
Large surface area: volume ratio,
and a short diffusion pathway
continuous aerobic respiration maintains conc gradient
fish gas exchange
A large Surface area
provided by many gill filaments covered in many lamellae
A short diffusion pathway
many capillaries with single layer of thin walled epithelium
A concentration gradient
continuous flow of blood
Counter current flow
Gas exchange in humans
Gas exchange
Large Surface Area
Large Concentration Gradient
Thin Exchange Surface
Ventilation
Gas exchange and water loss in plants
Minimising water loss
stomata mainly on underside only
thick waxy cuticle
Guard cells
Gas Exchange
Large Surface Area
Spongy mesophyll - air spaces
Flat thin leaves
Large number of stomata
Large Concentration gradient
By day, photosynthesis is faster than respiration
By night, only respiration occurs
Thin exchange surface
Flat thin leaves
Spongy mesophyll cells have thin cell walls
Gas exchange and preventing water loss in insects
Minimising water loss
chitin all over body
Spiracles surrounded by hairs, guarded by valves
Gas Exchange
Large Surface Area
Branching
system of
many tracheoles
Large Concentration Gradient
respiration maintain Lowe oxygen concentrations
abdominal pumping
Thin Exchange Surface
very thin tracheal walls
Gas exchange and water loss
Fick's law
efficient gas exchange
Provide a large SA
Maintain a high concentration gradient
Ensure that the exchange surface is as thin as possible