What distinguishes the face structure of the Western lowland gorilla, related to diet processing?
Answer
A broad face with a heavy brow ridge
The facial and cranial morphology of the Western lowland gorilla is robust, a direct consequence of the mechanical demands placed upon the jaw apparatus for consuming substantial amounts of tough, fibrous vegetation. This adaptation manifests as a broad face structure, often giving the expression a solemn appearance, largely due to a prominent heavy brow ridge situated over their deep-set eyes. Although they possess large canine teeth used for displays, the overall facial architecture is adapted to support the powerful muscles needed for grinding and preparing bulky plant matter for digestion.
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