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Most mollusks are herbivores, carnivores, or filter feeders though there are some species that are detritus feeders or are parasitic. Many mollusks (ie. snails and slugs) feed through a tongue shaped structure called a radula. A radula is a layer of flexible skin with hundreds of tiny teeth making it appear like sandpaper.


DIGESTION Cephalopods' muscular stomach is located roughly in the midpoint of the visceral mass. After digestion in the stomach, the bolus moves to a long, white organ, caecum for digestion. Lastly the food goes to the liver, for nutrient absorption and solid waste is excreted through the rectum. Octopuses are said to have external digestion.


acoelomate Pl at yh el m N in em th pseudocoelomates es at o da R ot ife ra An ne lid a M ol lu sc a protostomes Ar th ro po Ec da eucoelomates hi no de rm at Ch a or da ta Phylum Mollusca “soft bodied” animals Mollusca Characteristics Body Plan • head-foot: contains sensory organs and muscles • visceral mass: contains digestive, reproductive, circulatory organs • mantle: skin of the ...


The digestive system of gastropods (slugs and snails of every kind) has evolved to suit almost every kind of diet and feeding behavior. Gastropods as the largest taxonomic class of the mollusca are very diverse indeed: the group includes carnivores, herbivores, scavengers, filter feeders, and even parasites.


Most earthworms are scavengers that feed on dead organic matter. They feed by passing soil through the gut, from which nourishment is extracted, or by eating organic debris, including leaves accumulated on the surface of the soil. The digestive system is divided into a number of regions, each with a special function.


Mollusca is the second largest phylum of invertebrate animals. The members are known as molluscs or mollusks (/ ˈ m ɒ l ə s k /).Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms.


Arthropod - Digestive system and feeding: Arthropods exhibit every type of feeding mode. They include carnivores, herbivores, detritus feeders, filter feeders, and parasites, and there are specializations within these major categories. Typically, paired appendages around the mouth are used for collecting and handling food and are usually specialized in accordance with the particular diet of ...


Molluscs: Feeding mechanisms. Molluscs have a variety of different feeding mechanisms. The bivalve molluscs can filter-feed fine particles form the water. Some of the single-shelled molluscs possess a ribbon-shaped tongue or radula, covered with rasping teeth, which enables the animal to scrape algae from the rock.Whelks have a radula on a stalk that can extend beyond the shell and be used to ...


Learn about the animal phylum Mollusca and its most important body systems. Mollusca includes a wide range of common invertebrate species that can inhabit land, freshwater, and saltwater ...


Mollusk: Mollusk, any soft-bodied invertebrate of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body. Along with the insects and vertebrates, it is one of the most diverse groups in the animal kingdom, with nearly 100,000 (possibly