According to Yahoo!Education, an Annelida's digestive system revolves around a muscular gizzard and calciferous glands. Most annelids have soil diets and the gizzard grinds ingested soil to draw out the organic matter th... More »

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The three classes of organisms in the phylum annelida include freshwater worms and earthworms (oligochaetes), marine worms (polychaetes) and leeches (hirudineans). Together, these three classes contain 12,000 known speci... More »

Annelids share the common characteristics of size and symmetry and have body walls and coeloms. Although they vary widely in habitat area and live in different environments around the world, annelids have structured nerv... More »

Earthworms are tube-shaped, segmented worms found living in soil, where they feed on organic matter. An earthworm's digestive tract is laid out straight from the oral orifice to the anus. The parts of the digestive tract... More »

The earthworm's crop is responsible for storing food after it has passed through the esophagus, which possesses calciferous glands that release calcium carbonate to help remove any excess quantities of calcium from the b... More »

The typhlosole in earthworms increases the surface area of the intestine for efficient secretion and absorption during digestion. It is named for the Greek word for "blind pipe," and the typhlosole can be defined as an e... More »

The grasshopper's digestive system is the system of organs and glands responsible for breaking down food for use by the body. It consists of the foregut, or stomodaeum; the midgut, or mesenteron; and the hindgut, or proc... More »