CAECA - Blind-ended section of the large intestine where bacterial digestion occurs, ISTHMUS - Section of oviduct between the magnum and the uterus consisting of a thick layer of circular muscle and where the inner and outer shell membranes are formed, SUPRACORACOID - Flight muscle responsible for the upstroke, DIGITAL FLEXOR TENDON - Supplies each of the digits and is responsible for the perching reflex, CHOANA - Cleft in the hard palate found in some birds that connect the oral and nasal cavities, PINIONING - Methods of preventing flight by cutting the end of the wing at the carpus when the chick is between 4-10 days old, COELOM - Thoraco-abdominal cavity, there is only one combined cavity, CROP MILK - Crop secretion in some birds which is rich in proteins and fat, influenced by the hormone prolactin. Used to feed the young for the first few days after hatching, PRIMARIES - Flight feathers that attach to digit 3 and the fused metacarpal bones that provide the major thrust during flight,

BIRDS 2 Anatomy & Physiology Key Points

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