Ear , Nose , and Throat disorder
Prepared by Tesfa D. (B.Sc. in Nursing)
, Anatomic and Physiologic
Overview of Ear
The ears are a pair of complex sensory organs
located in the middle of both sides of the head
(that attaches to the temporal bone of cranium)
at approximately eye level. This position is
important b/c, it enables
Biaural hearing.
To detect the direction of the sound.
Aid in maintaining equilibrium.
Lecture Note for Third Year Extension Nursing
Students, November 2003/2010. 2
, Cont…d
Lecture Note for Third Year Extension Nursing
Students, November 2003/2010. 3
, Anatomy of the external ear
The external ear, housed in the temporal bone, includes
the auricle (i.e., pinna) and the external auditory
canal.
The external ear is separated from the middle ear by a
disklike structure called the tympanic membrane (i.e.,
eardrum).
Auricle- the auricle, attached to the side of the head by
skin, is composed mainly of cartilage, except for the fat
and subcutaneous tissue in the earlobe.
The function of auricle is to collects the sound waves
and directs vibrations into the external auditory canal.
Lecture Note for Third Year Extension Nursing
Students, November 2003/2010. 4
Prepared by Tesfa D. (B.Sc. in Nursing)
, Anatomic and Physiologic
Overview of Ear
The ears are a pair of complex sensory organs
located in the middle of both sides of the head
(that attaches to the temporal bone of cranium)
at approximately eye level. This position is
important b/c, it enables
Biaural hearing.
To detect the direction of the sound.
Aid in maintaining equilibrium.
Lecture Note for Third Year Extension Nursing
Students, November 2003/2010. 2
, Cont…d
Lecture Note for Third Year Extension Nursing
Students, November 2003/2010. 3
, Anatomy of the external ear
The external ear, housed in the temporal bone, includes
the auricle (i.e., pinna) and the external auditory
canal.
The external ear is separated from the middle ear by a
disklike structure called the tympanic membrane (i.e.,
eardrum).
Auricle- the auricle, attached to the side of the head by
skin, is composed mainly of cartilage, except for the fat
and subcutaneous tissue in the earlobe.
The function of auricle is to collects the sound waves
and directs vibrations into the external auditory canal.
Lecture Note for Third Year Extension Nursing
Students, November 2003/2010. 4
