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Anatomical terms of location - Wikipedia

Standard anatomical terms of location deal unambiguously with the anatomy of animals, including humans.. All vertebrates (including humans) have the same basic body plan – they are strictly bilaterally symmetrical in early embryonic stages and largely bilaterally symmetrical in adulthood. That is, they have mirror-image left and right halves if divided down the middle.

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Symmetry in Organismal Biology - Brown University

Symmetry in Organismal Biology ... Animals possessing bilateral symmetry have a dorsal (top) side, a ventral (bottom ) side, an anterior (head) end, a posterior (tail) end, and a distinct left and right side. ... but their embryonic development and internal anatomy show that they arose from a bilaterally symmetrical ancestor. Images of symmetry ...

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Echinoderm - Form and function of external features ...

Echinoderm - Echinoderm - Form and function of external features: Echinoderms have a skeleton composed of numerous plates of mineral calcium carbonate (calcite).

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KINGDOM ANIMALIA: General Characteristics of Animals ...

Radially Symmetrical; Like a wheel, animals with this spend most of their time floating like a buoy or attached to rocks. Differences between the dorsal and ventral surfaces allow jellyfish to float upright; sea anemones grip rocks with their ventral surfaces and collect food with their specialized dorsal surfaces.

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What is Moment of Inertia and How to Calculate it for a Rod

Consider a rod of mass 'M' and length 'L' such that its linear density λ is M/L. Depending on the position of the axis of rotation, the rod illustrates two moments: one, when the axis cuts perpendicular through the center of mass of the rod, exactly through the middle; and two, when the axis is situated perpendicular through one of its ...

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Fish anatomy - Wikipedia

Dorsal fins are located on the back. Most fishes have one dorsal fin, but some fishes have two or three . The dorsal fins serve to protect the fish against rolling, and assists in sudden turns and stops. In anglerfish, the anterior of the dorsal fin is modified into an illicium and esca, a biological equivalent to a fishing rod and lure.

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Symmetrical Seals | Fluid Seals | American High ...

Symmetrical Seal Design – Symmetrical seals are seals where the shape of the outside diameter sealing lip is a mirror image of the shape of the inside diameter sealing lip (Fig.1). – Symmetrical seals are centered in the gland and can be used as either rod seals or piston seals (Figs. 2 and 2a)

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Chordates - Chordata - The Animal Encyclopedia

Chordates have a single, tubular nerve cord that runs along the back (dorsal) surface of the animal which, in most species, forms a brain at the front (anterior) end of the animal. They also have pharyngeal pouches that are present at some stage in their life cycle.

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Stethacanthus | Strange Shaped Fish | DK Find Out

One of the oddest of all prehistoric fish, Stethacanthus had a dorsal fin shaped like an ironing board, with a cluster of toothlike scales called denticles on top. It had more toothlike scales on its head, and its side fins had long, pointed rods called whips trailing behind them.

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Difference Between Hemichordata and Chordata ...

Jan 30, 2018 · Chordata is a phylum of Kingdom Animalia. It is the phylum that includes humans and other familiar animals that are highly evolved. Phylum Chordata consists of animals that possess several characteristic features such as the presence of notochord (a stiff, dorsal supporting rod), a dorsal hollow nerve cord and paired pharyngeal gill slits.

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KINGDOM ANIMALIA: General Characteristics of Animals ...

Animal Systems. There are two types of reproduction in the main animal kingdom. One type of fertilization is external this type is like birds and fish where they lay eggs, and then the male fertilizes them. With internal fertilization, that is what many of the chordates such as marsupials, humans etc. have this type.

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Bio chapter 32 Questions and Study Guide | Quizlet ...

Start studying Bio chapter 32. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. ... Symmetrical phyla include all of the following except. sponges. ... cell at the dorsal part of the archenteron begin by dividing rapidly and form mesodermal pouches in which the coelom develops.

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Anatomy - Wikipedia

Macroscopic anatomy, or gross anatomy, is the examination of an animal's body parts using unaided eyesight. Gross anatomy also includes the branch of superficial anatomy. Microscopic anatomy involves the use of optical instruments in the study of the tissues of various structures, known as histology, and also in the study of cells.

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A newly recognized fossil coelacanth highlights the early ...

Jan 22, 2006 · The dorsal and ventral lobes of the caudal fin are strongly asymmetrical, with the dorsal lobe extending much further anteriorly, as in Allenypterus (Lund & Lund 1985; Forey 1998). No components of the first dorsal, pectoral, anal or pelvic fins are preserved.

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The Phylum Chordata - EarthLife

1)Bilaterally symmetrical. 2)Body has more than two cell layers, tissues and organs. 3)Body cavity a true coelom. 4)Most possesses a through gut with a non-terminal anus. 5)Body monomeric with no head or jaws. 6)Possess at some stage of their life a hollow dorsal nerve tube.

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Symmetrical Compression Post | Simpson Strong-Tie

A Designer may use either a symmetrical or an asymmetrical post configuration. These elements are specified by the Designer. Simpson Strong-Tie offers guidance by providing standard tables for compression elements. Symmetrical Posts. An equal number of posts or studs on each side of the Strong-Rod.

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Rhinoplasty Before and After Photographs - Rod J. Rohrich

This Ethnic patient desired his dorsal hump to be removal as well as his nasal tip to be more symmetrical and refined. He had an Open Rhinoplasty. The photo on the right was taken 1 month after surgery and shows the removal of the hump, a narrowing of the dorsum and a more sculpted nose tip.

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Falcatus | Fossil Wiki | FANDOM powered by Wikia

Falcatus falcatus (the name refers to the sickle-shaped first dorsal fin spine) is an extinct species of small cladodont-toothed stethacanthid shark from the genus Falcatus. It is placed in its own family, Falcatidae, along with, and closely related to, Damocles serratus .

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EDUCATION FOR FISH: FINS - bharatpurkhabar.blogspot

the dorsal and caudal fins. The paired fins are the pectorals and pelvics or ventrals corresponding to the fore and hind limb, respectively of the terrestrial vertebrates. In some species, tiny fin like structures, known as finlets, are present between the dorsal and the caudal fins or .

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Order Dorylaimida (Jairajpuri and Ahmad Key)

Dorsal esophageal gland nucleus two or more body widths behind anterior of esophageal enlargement; tail long, filiform Hulqinae Subfamily Qudsianematinae Jairajpuri, 1965

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