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The furcula (Latin for "little fork"; pl.: furculae) [a] or wishbone is a forked bone found in most birds and some species of non-avian dinosaurs, and is formed by the fusion of the two clavicles. [1] In birds, its primary function is in the strengthening of the thoracic skeleton to withstand the rigors of flight.
Swimming birds have a wide sternum, walking birds have a long sternum, and flying birds have a sternum that is nearly equal in width and height. [19] The chest consists of the furcula (wishbone) and coracoid (collar bone) which, together with the scapula , form the pectoral girdle ; the side of the chest is formed by the ribs, which meet at the ...
The furcula, or furca is a forked, tail-like appendage. It is present in most species of springtails , and in them it is attached ventrally to the fourth abdominal segment. The organ most often is present in species of Collembola that lives in the upper soil layers where it is used for jumping to avoid predators. [ 1 ]
furcula Also, wishbone; merry-thought. From the Latin for "little fork", the furcula is a forked bone, also found in some dinosaurs, located below the neck and formed by the fusion of the two clavicles. Its primary function is in the strengthening of the thoracic skeleton to withstand the rigors of flight.
The squamosal bone was fully incorporated into the braincase wall, making its exact borders impossible to determine, which is also true for adult modern birds. Various interpretations have been proposed of the morphology and identity of the bones in the temporal region behind the orbits, but it may not be resolvable with the available fossils.
Most birds have four toes, typically three facing forward and one pointing backward. [7] [10] [8] In a typical perching bird, they consist respectively of 3, 4, 5 and 2 phalanges. [2] Some birds, like the sanderling, have only the forward-facing toes; these are called tridactyl feet while the ostrich have only two toes (didactyl feet).
العربية; Azərbaycanca; বাংলা; Banjar; Беларуская; Беларуская (тарашкевіца) Български; Català; Čeština
This stylised bird skeleton highlights the synsacrum Pelvis of a Gull; formed by the Synsacrum (fused vertebrae placed centrally) and the two innominate bones either side. The synsacrum is a skeletal structure of birds and other dinosaurs, in which the sacrum is extended by incorporation of additional fused or partially fused caudal or lumbar ...