absorptive nutrition

biology

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July 21, 2026

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Absorptive nutrition is a method of feeding where organisms secrete digestive enzymes externally to break down complex organic matter into simpler molecules. These dissolved nutrients are then absorbed directly through the organism's body surface, typically through specialized structures like hyphal walls in fungi.12

This contrasts with ingestive nutrition, where food is taken into the body before digestion occurs. Fungi, for example, are heterotrophic and rely on absorptive nutrition. They can obtain nutrients from dead organic material (saprotrophism) or from living organisms (parasitism). This process allows fungi to break down insoluble substances like starches and proteins, making them essential decomposers in ecosystems.3412

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saprotroph
…by a process known as absorptive nutrition, in which the nutritional substrate (e.g., dead organism or other nonliving organic matter) is directly digested by a variety of enzymes that are excreted by the saprotroph. The enzymes convert the detritus into simpler molecules, which are then absorbed by the cells to…
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…by a process known as absorptive nutrition, in which the nutritional substrate (e.g., dead organism or other nonliving organic matter) is directly digested by a variety of enzymes that are excreted by the saprotroph. The enzymes convert the detritus into simpler molecules, which are then absorbed by the cells to…
Read More