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Module 1: Communication

(a) Outline the need for communication systems within multicellular organisms

Multicellular organisms have many layers of cells that need to communicate with each other. The vast
number of cells results in the great amount of distance that messages need to travel, hence the need
for a communication…

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o temperature(vasodilation) or raise it by o The contraction of muscles during
preventing temperature lose (vasoconstriction) shivering generates heat


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