NEET BIOLOGY

Detailed explanation-1: -Organisms belonging to Phylum Mollusca excrete with the help of metanephridia . In some molluscs, the organ of Bojanus is the metanephridia which act as a kidney and performs excretion. Other organs perform excretion for different organisms.

Detailed explanation-2: -A metanephridium is a type of excretory gland. This gland is found in annelids, arthropods and molluscs. A metanephridium consists of an opening into the body cavity. This opening is funnel shaped and contains cilia. This is connected to a duct which opens to the exterior.

Detailed explanation-3: -A metanephridium (meta = “after") is a type of excretory gland found in many types of invertebrates such as annelids, arthropods and mollusca. (In mollusca, it is known as the Bojanus organ.)

Detailed explanation-4: -Metanephridium is an excretory organ found in invertebrates like arthropods, annelids and molluscs. It has ciliated funnel structures which open into the body cavity that is attached to a duct. This structure finally opens to the invertebrate’s exterior.

Detailed explanation-5: -The vast majority of mollusks are aquatic and excrete nitrogen in the form of ammonia. In octopuses, however, nitrogen is excreted as ammonium chloride, which is quite strongly concentrated in the urine. Terrestrial snails and slugs excrete uric acid but may also excrete ammonia when living in moist surroundings.