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transport in cells - Coggle Diagram
transport in cells
lungs
diaphragm
dome shaped muscles under lungs that contracts and flattens during inhalation
trachea
airpipe that takes air down throat
pleural membrane
left lung
bronchus
large airway that leads away from trachea
intercoastal muscle
muscle between ribs
bronchioles
tiny branch of air tubes that carry air into alveoli
ribs
air sac/alveoli
air sacs at the end of bronchioles where the lungs and blood exchange carbon dioxide and oxygen
diffusion
the movement of molecules from an area of higher concentration to an area of lower concentration
factors of diffusion
the temperature
surface area of the membrane
a single celled organism has a relatively large surface area to volume ratio - this allows sufficient transport of molecules into and out of the cell to meet the needs of the organism
in a multi celled organism, surfaces and organ systems are specialised for exchanging materials, this allows sufficient molecules to be transported in and out of cells for the organism's needs.
the effectiveness of an exchange system is increased by
having a large surface area
a membrane that is thin. to provide a short diffusion path
having an efficient blood supply
being ventilated
difference in concentrations
osmosis
the diffusion of water