Fungi show extracellular digestion but they don't have ailmentry canal as in human so how?

Although fungi lack digestive tract like a human, they use extracellular digestion. Fungi are heterotrophic organisms and their means of nutrition is heterotrophic. They use extracellular sources of organic matter to maintain their growth and reproduction. These extracellular sources of energy can be in the form of simple sugars, complex carbohydrates, or polypeptides. They do this with the help of their walls.

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