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A front view of the frontal bone; a,a, frontal sinuses; b, the temporal arch, beneath which lies the temporal muscle, which closes the lower jaw; d, the supra-orbitary hole for a passage of a branch of the fifth pair of nerves.

Frontal Bone

A front view of the frontal bone; a,a, frontal sinuses; b, the temporal arch, beneath which lies the…

The frontal bone from behind.

Frontal Bone from Behind

The frontal bone from behind.

The frontal bone viewed from below.

Frontal Bone Viewed From Below

The frontal bone viewed from below.

Anterior view of the frontal bone.

Anterior View of Frontal Bone

Anterior view of the frontal bone.

A side view of the skull. Labels: O, occipital bone; T, temporal bone; Pr, parietal bone; F, frontal bone; S, sphenoid; Z, malar; Mx, maxilla; N, nasal; E, ethmoid; L, lachrymal; Md, inferior maxilla.

The Skull

A side view of the skull. Labels: O, occipital bone; T, temporal bone; Pr, parietal bone; F, frontal…

The human skull, showing the bones of the head. <em>a</em>is the large bone of the forehead known as the frontal bone; <em>b</em> is known as the parietal bone, and <em>c</em> is the temporal bone.

Skull

The human skull, showing the bones of the head. ais the large bone of the forehead known as…