Question

Where is foramen triosseum found ?? In whose Pectoral Girdle ?? 1. Mammal 2. Varanus 3.bird 4.frog ???

Answer 1

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ANSWER IS MAMMALS

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Answer 2

The answer is (3) Bird. In Pectoral girdle, the tendon of Supra-coracoid muscles passes via an opening called foramen triosseum. It makes the lifting action possible, and it provided power for making upward stroke for a bird.

This foramen is shaped between the scapula coracoid and clavicle bones.

The upper surface of the humerus is found attached in the foramen triosseum.