Describe the general body plan of mollusks
Webtentacles. g. Describe in a few sentences what is meant by medusa stage and polyp stage; tell how they differ from one another. Cnidarians in the polyp stage are stationary and must wait for prey. In the medusa stage, they float freely and their mouth is facing the bottom as opposed to the top. Also, cnidarians in the medusa stage are bell-shaped and somewhat … WebThe word cephalopod means "head-footed" and describes the body structure of the invertebrates. Cuttlefish, like most cephalopods, have a large and well-developed head. Their foot is divided into may tentacles …
Describe the general body plan of mollusks
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WebMar 5, 2024 · Mollusks have a circulatory system with one or two hearts that pump blood. The heart is a muscular organ that pumps blood through the circulatory system when its muscles contract. The circulatory system may be open or closed, depending on the … In some areas, as many as one out of three children are infected. Humans become … We would like to show you a description here but the site won’t allow us. WebJan 11, 2024 · Mollusks are a very diverse phylum. Some mollusks are nearly microscopic. The largest mollusk, a colossal squid, may be as long as a school bus and weigh over half a ton! The basic body plan of a mollusk is shown in Figure below. The main distinguishing feature is a hard outer shell. It covers the top of the body and encloses the internal organs.
WebNov 30, 2024 · Explore the bodies of mollusks, members of the phylum Mollusca, share three common body parts, including the foot, mantle, and visceral mass. Learn about the digestive systems and radula of phylum ... WebBriefly describe the general body plan of a typical sponge. Also describe the germ layer and symmetry. Takes shape of an irregular cylinder with a large central cavity. Sponges have 2 germ layers, ... Describe the three key characteristics shared by …
WebThe body plan of a mollusk usually consists of a head region, a muscular foot, and a visceral mass of internal organs that is often contained within a dorsal shell. Each class possesses some variation on this basic plan. The organization of the gastropod body is very similar to the basic body plan of mollusks. WebReduced to its simplest dimensions, the mollusc body plan may be said to consist of a headfoot portion and a visceral mass portion (Figure 16-2). The head-foot is the more active area, containing the feeding, cephalic …
WebThe circulatory system of most mollusks is an open system. In an open circulatory system, the heart moves blood out into the open spaces around the body organs. The blood …
Web5) All mollusks except bivalves, have a radula , a rasping tongue like organ (containing 1,000s of tiny teeth) used to get food. Mollusk Body Plan 3 Parts #1 Visceral Mass : … grantham pool hallWebJun 8, 2024 · The name “mollusca” signifies a soft body; the earliest descriptions of mollusks came from observations of unshelled cuttlefish. Mollusks are predominantly a … chipboard paintWebMollusks are primarily of separate sexes, and the reproductive organs (gonads) are simple. While some reproduce by parthenogenesis, most reproduction is by sexual means. Mollusks show diversity in habitats and feeding habits. Food may be various microorganisms, crustaceans, and fishes. Mollusks also have a wide range of … chipboard paper mills distributorsWebFeb 14, 2024 · cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives. The extinct forms outnumber the living, the class having attained great diversity in late Paleozoic and … chipboard philippinesWebThe organisms belonging to phylum Mollusca exhibit the following characteristics: They are mostly found in marine and freshwater. Very few are terrestrial and found in moist soil. They exhibit organ system level of … chipboard perthWebThe 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 … chipboard phrasesWebThe phylum Mollusca is divided into several classes. These classes are defined primarily on the basis of body plan, type of shell, and modifications of the internal organs. Some of the more popular classes are discussed here. Aplacophorans. The class Aplacophora comprises about 300 species of wormlike marine organisms that lack shells. chipboard panels uk