Pectoral girdle of fish
WebThe pectoral girdle is situated posterior to the last branchial arch and consists of two semicircular cartilages united with one another along the mid-ventral line. The dorsal portion of each half is composed of a thick and rod-like scapula and the ventral portion is made up of a thin and flattened corcacoid (Fig. 1.31 A). WebJun 6, 2005 · The pectoral girdle (Fig. 2B, Fig. 3) is the anchor upon which the pectoral muscles originate. The anteroventral surfaces of the cleithrum, both laterally and medially, as well as scapula and
Pectoral girdle of fish
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WebFirst two branchial arches articulate to a single basibranchial Synapomorphies of pectoral girdle: In addition to the endochondral scapulocoracoid, there is a series of paired dermal elements that couple … WebMar 21, 2024 · The pectoral girdle consists of two bones: Clavicle or collar bone Scapula or shoulder blade
WebApr 13, 2024 · a typical dermal pectoral girdle. As such, ... This would agree with the fish and plant assemblage previously recorded from the upper part of the Dô Son Formation at Dô Son. The question of the ... WebSee the demonstration material of the shark skeleton and pectoral girdles. Note the coracoid bar, lateral scapular processes and the suprascapular processes at their tips. Examine the Teleost (bony fish) pectoral girdle, and note the addition of the dermal elements; the post-temporal bone may abut the posterior of the skull, as in the ...
WebPectoral girdles: 1 - brace for anterior appendages 2 - consist of membrane & replacement bones (in bony vertebrates) 3 - Early fishes had 3 replacement bones (coracoid, scapula, & … WebThe pectoral girdle is designed to absorb the shock of the anuran as it lands on its forelimbs; an elastic, muscular suspension connecting the pectoral girdle to the skull and vertebral column provides this ability. The pelvic girdle horizontally flanks the coccyx, the bony rod at the posterior end of the vertebral column.
Web1 - Skeletal, striated, voluntary muscles axial body wall & tail hypobranchial & tongue extrinsic eyeball muscles appendicular branchiomeric (homologous to the branchial/ pharyngeal muscles from fishes to mammals, striated …
WebThe pectoral girdle is composed of two cartilage and onedermal bone in acanthopterygians. The dermal cleithrum is the largest, dorsal most, and anterior most element of thepectoral … nuk happy days sootherWebJan 23, 2014 · Shubin and colleagues found Tiktaalik fossils, each about nine feet long, on Ellesmere Island in 2004. The lobe-finned fish had a flattened, crocodile-like head with sharp teeth and nostrils. Tiktaalik ‘s bony lobed fins and sturdy pectoral girdle seemed to answer the evolutionists’ quest for a fish ready to walk out of water. nuk glow in the dark sootherhttp://people.eku.edu/ritchisong/342notes6.htm ninja warrior outdoor playsetWebChanges in the Pectoral Girdle During Evolution of Tetrapods 1. endochondral bone. 2. girdle is well suited for aquatic life, but poorly suited for life on land. 3. Describe the two major changes in the pectoral girdle that occurred as the first tetrapods moved to land, and indicate how these changes facilitated life on land. 4. nuk hard spout bottleWebApr 10, 2024 · A pectoral girdle, also referred to as the shoulder girdle, connects your upper limbs to the bones along the axis of your body. You have two pectoral girdles in your … nuk hard spout active sippy cupWebA sternum having two separate parts is fused to the middle of the pectoral girdle. The pectoral girdle is reinforced anteriorly by an omosternum and posteriorly by a mesosternum and their cartilaginous expansions, the … nukhbaacollectionsWebApr 6, 2006 · Overall, the skeleton of Tiktaalik is that of a flat-bodied animal with raised and dorsally placed eyes, a mobile neck, imbricate ribs, and a pectoral girdle and forefin capable of complex ... nuk hard spout cup