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Bird anatomy, or the physiological structure of birds' bodies, shows many unique adaptations, mostly aiding flight.Birds have a light skeletal system and light but powerful musculature which, along with circulatory and respiratory systems capable of very high metabolic rates and oxygen supply, permit the bird to fly.
This stylised bird skeleton highlights the uncinate processes The uncinate processes of the ribs are extensions of bone that project caudally from the vertical segment of each rib . (Uncinate means hooked from Latin uncinatus , from uncinus , barb, from uncus , hook.)
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The anatomy of bird legs and feet is diverse, encompassing many accommodations to perform a wide variety of functions. [ 1 ] Most birds are classified as digitigrade animals, meaning they walk on their toes rather than the entire foot.
Surface anatomy (also called superficial anatomy and visual anatomy) is the study of the external features of the body of an animal. [1] In birds , this is termed topography . Surface anatomy deals with anatomical features that can be studied by sight, without dissection .
Though it existed approximately 75 million years before the oldest known bird, its skeletal structure is allegedly more bird-like. [11] Protoavis has been reconstructed as a carnivorous bird that had teeth on the tip of its jaws and eyes located at the front of the skull, suggesting a nocturnal or crepuscular lifestyle. [ 12 ]
The uncinate processes are the small white spurs about halfway along the ribs. The rest of this diagram shows the air sacs and other parts of a bird's respiratory system:1 cervical air sac, 2 clavicular air sac, 3 cranial thoracal air sac, 4 caudal thoracal air sac, 5 abdominal air sac (5' diverticulus into pelvic girdle), 6 lung, 7 trachea
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