Body structure of mollusks
WebSep 23, 2024 · The mollusks are a diverse group (85,000 described species) of mostly marine species. They have a variety of forms, ranging from large predatory squid and octopus, some of which show a high degree of intelligence, to small grazing forms with elaborately sculpted and colored shells. The annelids traditionally include the … WebThe circulatory system. Mollusks possess an open circulatory system in which body fluid is transported largely within sinuses devoid of distinct epithelial walls.The posteriodorsal heart enclosed in a pericardium typically consists of a ventricle and two posterior auricles. Hemolymph is drained from ctenidia, gills, or other specialized respiratory epithelia into …
Body structure of mollusks
Did you know?
WebMollusks are very efficient in the use of their body parts. They never settle for one function when an organ could serve two or six purposes at once. A good example of this is the mantle, a membranous projection of a …
WebJan 12, 2024 · A bivalve is a mollusk with a flat body protected by two shells known as valves. (The word “bivalve” means (“two valves”.) ... A chiton’s shell is surrounded or completely enclosed by a muscular structure known as a girdle. Most chitons are herbivores, feeding on algae, but some species are omnivorous or even carnivorous, … WebMolluscs have a mantle or mass of soft flesh that covers the soft body and encloses the internal organs. In many species, the mantle produces a hard shell. Not all molluscs produce a shell. Many molluscs have a radula, …
WebA cuttlefish, a coleoid cephalopod, moves primarily by undulating its body fins. Mollusca is one of the most diverse groups of animals on the planet, with at least 50,000 living species (and more likely around 200,000). It … WebSponges consist of an outer layer of flattened cells and an inner layer of cells called choanocytes separated by a jelly-like substance called mesohyl. The mesohyl contains embedded amoeboid cells that secrete tiny needles called spicules or protein fibers that help give the sponge its structural strength.
WebThere are six features and systems that reveal an evolving complexity in the body structure of most worms: a mesoderm, an intermediate body layer between the inner (endoderm) and outer (ectoderm) tissue layers that forms muscle tissue a central nervous system guided by a “brain” an excretory system to eliminate some kinds of waste products
WebMollusks have distinct body plans that vary between the different classes. All Modalities. Add to Library. Details. Resources. Download. Quick Tips. Notes/Highlights. indiana ems reciprocityWebA bivalve shell is part of the body, the exoskeleton or shell, of a bivalve mollusk. In life, the shell of this class of mollusks is composed of two hinged parts or valves. Bivalves are very common in essentially all … loading verification formatWebAn animal body plan is the basic structure of the organs and tissues within their bodies. In the animal kingdom there are two major themes within body plans: symmetry and the organization of tissues and body cavities. ... Coelomates are represented by many animal phyla including the Mollusca, Annelida, Arthropoda, Echinodermata, and Chordata ... indiana encyclopediaWebMollusk Body Mollusks have distinct body plans that vary between the different classes. All Modalities Add to Library Details Resources Download Quick Tips Notes/Highlights Vocabulary Mollusk Body Plans - Advanced Loading... Notes/Highlights Image Attributions Show Details Show Resources indiana energy tax creditWebJun 8, 2024 · Mollusks can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda. These classes are distinguished by, among other criteria, the presence and types of shells they possess. Class Aplacophora includes worm-like animals with no shell and a … loading vending machineWebDec 13, 2024 · Description . Any group that embraces squids, clams, and slugs present a challenge when it comes to formulating a general description. There are only three characteristics shared by all living … indiana energy assistance program log inWebThe shell morphology and hinge structure are used in classification. In most surface-burrowing species (the hypothetical ancestral habit) the shells are small, spherical or oval, with equal left and right valves. In deeper-burrowing species the shells are laterally compressed, permitting more rapid movement through the sediments. loading versus maintenance