Dec 22, 2023 · In an interesting twist of evolutionary fate, the main structures responsible for filtering the water are (you guessed it!) the ctenidia. The ctenidia of filter-feeding bivalves are much larger in comparison to the ctenidia of non-filter-feeding bivalves such as deposit-feeding or predatory clams.

Jun 16, 2024 · Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable "foot" that protrudes from the shell and digs into the surrounding sediment, effectively enabling the …

Bivalve - Gills, Filter Feeding, Mantle: Primitive bivalves have paired gills that are small; in most other bivalves the gills are greatly enlarged. The vascular system contains the heart comprising a medial ventricle with left and right auricles. The reproductive system is simple.

May 31, 2024 · Bivalves employ their gills or ctenidia to filter phytoplanktons suspended in water (filter-feeding). However, primitive forms, like protobranchs, attach to the substrate with a pair of tentacles (each having a flap or palp) and scrape detritus.

Bivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves.

Aug 20, 2024 · Bivalves have large gills that serve dual purposes: gas exchange and food collection. They possess a circulatory system typical of mollusks, including a heart and blood vessels. The nervous system of bivalves consists of three pairs of …

All bivalves live in or very close to the water, and have lamellar gills for respiration (which are also used for feeding in many species). Bivalves include clams, scallops, mussels, oysters, and their relatives.

Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills. Some bivalves have a pointed, retractable "foot" that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow.

Bivalve - Anatomy, Mollusk, Shells: Bivalves have a symmetrical body that includes a mantle cavity, foot (where present), gills, anus, urogenital pores, and inhalant and exhalant chambers. They have paired labial palps in the mantle cavity that are used in feeding.

Bivalves are filter feeders, using their perforated gills as a sieve, which collects minute algae and other food particles suspended in the incoming respiratory water. These particles are trapped in strings of mucus secreted by the gills and conveyed to the mouth by cilia.