Avian 2-7

Avian 2-7 - • Stretches open during the downstroke •...

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Avian 2/7 Free stream flow - Ignore the air that isn’t moving Migration - Different parts of the bird o Fused hand o Synsacrum- fused pelvis and spine Adapts into a flight cage, provides rigidity o Uncinate processes stabilize cage around body o Shoulder Coracoid is large bone, muscle from sternum is attached Sternal keel= carina Attachment point for breast muscles Supracoracoideus muscles goes through bone, flex causes upstroke Pectoralis pulls down, causes downsroke Breast muscles are most aerobically active Dark red meat from myglobin Furculum Stores energy above sternum
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Unformatted text preview: • Stretches open during the downstroke • Snaps back for upstroke-Body mass centralized, underneath wings-Greatest heart size to body mass ratio of birds (heart mass as a percent of body mass) o Birds .82% o Mammals .59% o Non avian reptiles .51% o Fish .2% o For birds, 350-400 bpm, hummingbirds is 1300-Thermoregulation of birds o Open their mouths a little more and more (gaping) o Or just won’t fly if it’s too hot (+30C) o Or if its too cold (-0C) Pointed wings, low, wingloading, and calm air reduce migratory flight costs in songbirds-...
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Avian 2-7 - • Stretches open during the downstroke •...

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