61.
The orbit is the cavity in the upper facial skull which contains the _______
and its
. The orbit is shaped roughly like a
.
62.
Examples of the adnexa are the:
a.
.
b.
.
c.
.
d.
.
e.
.
63.
Of the six extrinsic ocular muscles, four are called _____ muscles. Two are
muscles. The lateral rectus M. is on the
side of the eyeball. The
superior rectus M. is
the eyeball. The medial rectus M. is on the
side
of the eyeball. The inferior rectus M. is
the eyeball. The superior oblique
and inferior oblique muscles approach the eyeball from the
side.
64. Attached to the margins of the orbit are the upper and lower
.
These have special hairs called
. The inner lining of the eyelids is
continuous with the
, a membrane over the anterior surface of the eyeball.
65.
In the upper outer corner of the orbit is a lacrimal
d, which secretes a
lacrimal
d, which is ultimately collected and delivered into the nasal chamber by
the
duct.
66. Neurons carry information from the photoreceptors located in the nervous
. They leave the eyeball at the
. Passing to the rear of the orbit, the
neurons now belong to the
nerve (cranial nerve ). The optic nerve enters
the cranial cavity by passing through the
canal. Beneath the brain, the optic
nerves from both sides join to form the
, in which half of the neurons from
each optic nerve
. From the optic chiasma, the right and left
optic
s proceed to the brain proper.
67.
The human ear has two major special sensory functions: __________
(
y) and
(
e). The three parts of the human ear are
the
(
) ear, the
ear, and the
(
) ear.
MD0006
11-48