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part of avian integumentary system
The wing tract includes the flight feathers proper (remiges) and their coverts (tectrices). The remiges include the primaries, arising from the “hand” and digits and attached to the hand’s skeleton; the secondaries, arising from the forewing and attached to the ulna; and the tertials (when present), arising from the upper wing and attached to the humerus. The tectrices cover the...
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