Name a muscle found in the cat but absent in the human that can extend the forelimb

Answer: xiphihumeralis

Xiphihumeralis muscle is a thin tendon-like band of muscle which runs lateral from the smaller pectoral muscle and inserts thru e proximal end of the humerus (arm bone) of a cat. It is the fourth muscle of the pectoralis group. It assists pectoralis minor and moves / extend the arms/forelimbs.