Features of a Primate Skulls

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Last updated 9:44 PM on 6/22/26
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12 Terms

1
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Brow Ridge

A bony ridge located above the eye sockets of all primates. A prominent ridge protected ancient hominins' faces by distributing forces developed during biting and chewing.

<p><span>A bony ridge located above the eye sockets of all primates. A prominent ridge protected ancient hominins' faces by distributing forces developed during biting and chewing.</span></p>
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cranium

Encloses the brain and protects it from injury.

<p><span>Encloses the brain and protects it from injury.</span></p>
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sagttial crest


A bony ridge running along the midline of the top of the cranium for attachment of jaw muscles.

<p><br><span>A bony ridge running along the midline of the top of the cranium for attachment of jaw muscles.</span></p>
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nuchal crest

A ridge of bone at the back of the skull for the attachment of neck muscles.

<p><span>A ridge of bone at the back of the skull for the attachment of neck muscles.</span></p>
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foramen magnum

A large opening at the base of the skull through which the spinal cord enters the skull.

<p><span>A large opening at the base of the skull through which the spinal cord enters the skull.</span></p>
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zygomatic arch

The 'cheek-bone'. Jaw muscles used for chewing pass through this arch. The muscles are attached from the skull to mandible.

<p><span>The 'cheek-bone'. Jaw muscles used for chewing pass through this arch. The muscles are attached from the skull to mandible.</span></p>
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mandible

The lower jaw; for the attachment of jaw muscles.

<p><span>The lower jaw; for the attachment of jaw muscles.</span></p>
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dental arcade

The shape made by the rows of teeth in an upper jaw. Humans' dental arcade is V-shaped / parabolic, while apes is much more U-shaped.

<p><span>The shape made by the rows of teeth in an upper jaw. Humans' dental arcade is V-shaped / parabolic, while apes is much more U-shaped.</span></p>
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canines

Teeth used to tear and rip food.

<p><span>Teeth used to tear and rip food.</span></p>
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premolars and molars

Teeth used to crush and grind food.

<p><span>Teeth used to crush and grind food.</span></p>
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diastema

A gap between the upper incisors and canines. The gap is used to accommodate the enlarged lower canines.

<p><span>A gap between the upper incisors and canines. The gap is used to accommodate the enlarged lower canines.</span></p>
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prognathism


When the lower portion of the face markedly projects forward.

<p><br><span>When the lower portion of the face markedly projects forward.</span></p>