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7. The sphceneidal sinus, which opens into the posterior
Mostrils.
8. The maxillary sinuses, which open into the nos"
trils at their sides.
9. Beside falisj the nostrils have the turbinated por-
tions of the ethmoid bone, and the inferior spongy bones, hang-
ing within them.
10. The opening of the ductus ad nasum.
All these parts are covered with a very vascular pituitary
membrane, called the Schneiderian, from its discoverer,
upon which the excretory ducts of the mucous glands open,
and the olfactory nerves are beautifully distributed, so that
the pituitary membrane not only covers the nostrils, but the
sinuses communicating with them.
The nostrils terminate anteriorly in the face, and posteriorly
in the fauces.
Arteries. The arteries of the internal soft parts are
branches of the internal maxillary and internal carotids.
Veins. The veins terminate in the orbital, temporal veins,
which convey their blood to the internal jugular.
Nerves. Besides the olfactory nerves, the nose is supplied
by the ophthalmic nerve, and superior maxillary.
Use. The nose is the organ of smelling; and it assists in
respiration and speech.
The physiology of smelling is delivered under the functions
of the nerves. See page 200.
Diseased appearances. Inflammation of the mucous
membrane, called catarrhns—ulceration, called ozena—mor-
bid thickening—polypus—obstruction in the ductus ad nasum
■—an adventitious opening through the lachrymal bone—ab-
scess of the antrum.
7. The sphceneidal sinus, which opens into the posterior
Mostrils.
8. The maxillary sinuses, which open into the nos"
trils at their sides.
9. Beside falisj the nostrils have the turbinated por-
tions of the ethmoid bone, and the inferior spongy bones, hang-
ing within them.
10. The opening of the ductus ad nasum.
All these parts are covered with a very vascular pituitary
membrane, called the Schneiderian, from its discoverer,
upon which the excretory ducts of the mucous glands open,
and the olfactory nerves are beautifully distributed, so that
the pituitary membrane not only covers the nostrils, but the
sinuses communicating with them.
The nostrils terminate anteriorly in the face, and posteriorly
in the fauces.
Arteries. The arteries of the internal soft parts are
branches of the internal maxillary and internal carotids.
Veins. The veins terminate in the orbital, temporal veins,
which convey their blood to the internal jugular.
Nerves. Besides the olfactory nerves, the nose is supplied
by the ophthalmic nerve, and superior maxillary.
Use. The nose is the organ of smelling; and it assists in
respiration and speech.
The physiology of smelling is delivered under the functions
of the nerves. See page 200.
Diseased appearances. Inflammation of the mucous
membrane, called catarrhns—ulceration, called ozena—mor-
bid thickening—polypus—obstruction in the ductus ad nasum
■—an adventitious opening through the lachrymal bone—ab-
scess of the antrum.