Ornithology: respiration

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\ Hollow bones and pneumatic bones allowed the dinosaurs to grow so large

the airsacks invade the hollow space inside the bone

sair sacks also assist in respiration

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diverticula: an individual diverticulum

-extends into humerous

cervical air sacks fill up and through the neck vertebrae

interclavicular air sack is found just proximal of the diversion of the two bronchials

air sacks’ air only travels only one way thru the lungs

anterior air sacks only accept air coming out of the lungs

posterior air sacks only accepts air from inhalation

portion of lungs closest to the posterior air sacks always have oxygen rich air

when the bird inhales and exhales, the lungs are being supplied with oxygen rich fresh air

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birds breath in concert with the flapping of their wings

caudal air sack is the same as posterior air sack

bernoulli’s principle: as the velocity increases, the pressure decreases

chance favors the informed mind

Coanda effect: any moving fluid that encountered a curved surface follows that curve

\ body cavity instead of abdominal cavity

intrapulmonary bronchus goes through the lung PC: pleural cavity

SP: subpulmonary cavity

AC: abdominal cavity

Air sacks: subpulmonary cavity

Oblique septum separates air sacks form abdominal cavity and digestive tract. without it cannot creat negative pressure in subpulmonary cavity to inflate air sacks

intercaustal muscles: in between the ribs

hypertrophy: if lose one of set, compensates with the other

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\ air comes in= pressure lowers

Air leaves= pressure increases

correlated progression

appendicocostalis: only one for moving sternum-negative pressure

external oblique: moving sternum back up after inhalation- positive pressure

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