TRANSPORT
How does the composition of the transport medium change as it moves around an organism?
investigate transport systems in animals and plants by comparing structures and components using physical and digital models, including but not limited to: (ACSBL032, ACSBL058, ACSBL059, ACSBL060)
macroscopic structures in plants and animals
microscopic samples of blood, the cardiovascular system and plant vascular systems
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investigate the exchange of gases between the internal and external environments of plants and animals
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compare the structures and function of transport systems in animals and plants, including but not limited to: (ACSBL033)
vascular systems in plants and animals
open and closed transport systems in animals
compare the changes in the composition of the transport medium as it moves around an organism
The vast majority of nutrients need by cells in the body are carried in the blood. Some of these are able to dissolve easily into the liquid medium others require specialised cells to aid in transport.
These nutrients include:
As the blood moves around the body and past different organs, substances enter or exit the blood stream.
The easiest way to remember these changes is to think about the organs where these nutrients enter body and the blood, and where they are used.
e.g. Oxygen comes into the body in the lungs and is used by all the other cells in the body. Therefore; blood will increase in oxygen as it passes the lungs and decrease as it flows past all other