What are the characteristics of the Mollusca excretory system?

Molluscs use extracellular digestion and contain a complete digestive system, with a mouth and an anus. Many mollusks, have an excretory organ called the nephidrium. The organ is necessary to maintain fluid balance. Some molluscs have a tongue-like structure with rough protrusions similar to small teeth. read more

Many mollusks, have an excretory organ called the nephidrium. The organ is necessary to maintain fluid balance. Some molluscs have a tongue-like structure with rough protrusions similar to small teeth. This structure is called the radula. The radula projects outside and helps to scrape food. read more

Similar to the excretory system of a slug, the primary organs of an oysters excretory system are the nephridia. The nephridia consist of two long, glandular tubes which open up into the body cavity, just beneath the heart and bladder. read more

Main characteristics of Mollusca : A ll modern mollusks have the same fundamental body plan. There are three distinct body zones: a head-foot, a visceral mass and a mantle. read more