Clavicular Air Sac

Some articles on air sac, clavicular air sac:

Dinosoor - Biology - Communication
... The syrinx depends on the air sac system in birds to function specifically, it requires the presence of a clavicular air sac near the wishbone or collar bone ... This air sac leaves distinctive marks or opening on the bones, including a distinct opening in the upper arm bone (humerus) ... While extensive air sac systems are a unique characteristic of saurischian dinosaurs, the clavicular air sac necessary to vocalize does not appear in the fossil record until the enantiornithines (one ...

Famous quotes containing the word air:

    As in hoary winter’s night stood shivering in the snow,
    Surprised I was with sudden heat which made my heart to glow;
    And lifting up a fearful eye to view what fire was near,
    A pretty Babe all burning bright did in the air appear;
    Robert Southwell (1561?–1595)