floor of the orbits are the maxillary sinuses; the largest
of the sinuses.
The palatine bones are located behind the maxillae
(fig. 3-10). The bones are somewhat L-shaped and
form the posterior portion of the hard palate and the
floor of the nose.
Anteriorly, they join with the
Zygomatic Bones (Zygoma, Malar Bone)
The zygomatic bones make up the prominence of
the cheeks and extend from the zygomatic process of
the temporal bone to the zygomatic process of the
maxilla. The zygomatic bones form the cheek bones
and help to form the sides and floor of the orbits.
Figure 3-10.Anterior view of palatine bones.
The lacrimal bones are the smallest and most
fragile of the cranial bones. These thin, scalelike
structures are located in back of the frontal process of
The nasal bones are small oblong bones somewhat
rectangular in shape. They lie side by side and are
fused at the midline to form the bridge of the nose
(nasal septum). These bones are responsible for the
shape of the nose.
Inferior Nasal Conchae
The inferior nasal conchae are curved, fragile,
scroll-shaped bones that lie in the lateral walls of the
They provide support for mucous
membranes within the nasal cavity.
The vomer bone is a thin, flat, single bone almost
trapezoid in shape. It connects with the ethmoid bone
and together they form the nasal septum.
The mandible (lower jaw-bone) is the longest,
strongest, and the only movable bone in the skull.
Figure 3-11 illustrates the anatomy of the mandible.
Figure 3-11.Anatomy of the mandible; lateral view (left), inferior view (right).