WebA. closed circulatory system B. fluid filled coelom C. jointed appendages D. segmented body E. tubular gut C. jointed appendages four of the five answers listed below are … WebBiology 18 Spring, 2008 1 Lab 5: Phylum Mollusca Objectives: Understand the taxonomic relationships and major features of mollusks Learn the external and internal anatomy of …
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Web22 mrt. 2024 · Typical molluscan features have been substantially altered, or even lost, in many subgroups. Among the cephalopods the giant squids ( Architeuthis ), the largest living invertebrates, attain a body length of … Web- body with pores, atria, and an osculum that serve for passage of water - multicellular; composed of an aggregation of specialized cells - aquatic; mostly marine - no symmetry - …
The most universal features of the body structure of molluscs are a mantle with a significant cavity used for breathing and excretion, and the organization of the nervous system. Many have a calcareous shell. Molluscs have developed such a varied range of body structures, finding synapomorphies … Meer weergeven Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks . Around 85,000 extant species of molluscs are recognized. The number … Meer weergeven Estimates of accepted described living species of molluscs vary from 50,000 to a maximum of 120,000 species. The total number of described species is difficult to estimate … Meer weergeven Feeding Most molluscs are herbivorous, grazing on algae or filter feeders. For those grazing, two feeding … Meer weergeven Fossil record Good evidence exists for the appearance of gastropods (e.g., Aldanella), cephalopods (e.g., Plectronoceras, Nectocaris) and bivalves Meer weergeven The words mollusc and mollusk are both derived from the French mollusque, which originated from the Latin molluscus, from mollis, soft. Molluscus was itself an adaptation of Aristotle's τὰ μαλάκια ta malákia (the soft ones; < μαλακός malakós "soft"), … Meer weergeven Because of the great range of anatomical diversity among molluscs, many textbooks start the subject of molluscan anatomy by describing what is called an archi-mollusc, hypothetical … Meer weergeven Opinions vary about the number of classes of molluscs; for example, the table below shows seven living classes, and two extinct ones. Although they are unlikely to form a … Meer weergeven Web22 mrt. 2024 · mollusk, also spelled mollusc, any soft-bodied invertebrate of the phylum Mollusca, usually wholly or partly enclosed in a calcium carbonate shell secreted by a soft mantle covering the body. Along …
Web13 dec. 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 mollusks: the presence of a mantle (the rear covering of the body) that secretes calcareous (e.g., calcium-containing) structures; the genitals and … Web11 dec. 2015 · Mollusk gills are called ctenidia, and they are made up of a series of thin filaments of tissue that resemble the teeth of a comb. These filaments absorb …
Web10 apr. 2024 · The visceral mass, in its compact form, contains the vital organs of the body, taking the form of dorsal humps or dome. These are the special features of Mollusca. …
Web24 jul. 2024 · However, we increasingly come to understand that morphological weirdness is the molluscan normal; this is a pattern evident from the diversity of living forms, and it is … lindsay hoyle speaker of the houseWebof molluscan morphological phenotypes is exemplified by well-known representatives such as the gastropods (snails, slugs), bivalves (clams, mussels), and cephalopods lindsay hubbard collegeWebSkin and mantle. 2. Molluscan gills or ctenidia or branchiae and. 3. Lungs or pulmonary sac. The outer covering of the body (skin) and mantle usually act as accessory … lindsay hoyle surgery chorleyWebThe body has a head, a foot and a visceral mass. This is all covered with a mantle (also known as a pallium) that typically secretes the shell. In some groups, like slugs and … lindsay hubbard occupationWeb10 jul. 2012 · The molluscan bauplan — by definition a combination of the ‘most significant features of the phylum’ — often resembles a generalized gastropod or pre-gastropod type, including shell, head with tentacles, a creeping foot and a visceral hump, a mantle cavity with gills, an alimentary tract with rasping radula, complicated stomach and intestinal … lindsay hubbard ex boyfriendWebA mollusk has a "foot," the body's muscular section, responsible for movement. The foot of some mollusks has also adapted to attaching to rocks and grasping prey. To ease … lindsay hubbard dating historyWeb24 mei 2024 · Furthermore, the molluscan taxa where partial or whole-genome assemblies are available are often aberrantly fast evolving or recently derived lineages. … lindsay hubbard plastic surgery