The Digestive Apparatus of a Beetle

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The Annulosa and Mollusca are furnished with a distinct alimentary canal that does not open into the body cavity. In most cases, the digestive canal communicates with the outer world by two-openings- a mouth and an excretory aperture. The annulosa system is demonstrated in the digestive apparatus of a beetle.

Keywords

beetle, digestion, annulosa

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Insect Anatomy

Source

Cutter, Calvin First Book on Analytic Anatomy, Physiology and Hygiene, Human and Comparative (Philadelphia: J. B. Lippincott & Co., 1875) 72

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