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Glt1 Task 3

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Produce a booklet that explains in detail why multicellular organisms need ventilation systems.
Explain the level of organisation, from organelles of a eukaryote cell to an organ system. This could take the form of a flow chart illustrating the concept with annotated illustrations showing the interrelationship between the levels.

Multicellular organisms need ventilation systems so that they can obtain oxygen and get rid of carbon dioxide. Another reason why ventilation systems are needed is because of the need to maintain a concentration gradient in the alveoli. The oxygen needs of the body are not met purely by surface diffusion as it is in smaller organisms so a special type of system has to step in. Adaptations and changes …show more content…
You need to eat and breathe and be able to respond to environmental changes. The surface area to volume simply cannot cope with diffusion that is based on gas exchange with the surroundings in multicellular organisms. Gas exchange in the body would not be possible without a system other than simple diffusion. Fick’s law states this. Ventilation supports this in organisms where diffusion simply cannot take place. Fick’s law is used to measure the rate of diffusion, the larger the difference in concentration and area, the quicker the rate. The circulatory system works hand in hand with ventilation as ventilation allows gas to enter the organism through the circulatory system so that this is reached to every cell. This allows gases to enter and be absorbed and waste products to be removed. Red blood cells carry oxygen while the alveoli diffuses the carbon dioxide. This system is constant and oxygen is constantly going in and replacing the carbon dioxide leaving. The ventilation system allows the concentration gradient to be lower in the red blood cells than in that of the alveoli. This allows diffusion to occur. Retaining a concentration gradient is important in the whole ventilation

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