The document provides an overview of the human ear, detailing its roles in hearing and balance, and its three main parts: external, middle, and inner ear. Key components include the tympanic membrane, ear ossicles, vestibular apparatus, and cochlea, which are essential for sound transduction and maintaining equilibrium. The cochlea contains the organ of Corti, responsible for the perception of sound, and is innervated by the cochlear division of the eighth cranial nerve.

1. SENSE ORGAN :
EAR
REPRESENTED BY MEHBUB ALAM
BSC NURSING
ADWIKA INSTITUTE OF NURSING

2. EAR
 Human ear is a sense organ of hearing and equilibrium , that detects and
analyses sound by transduction (the conversion of sound waves into
electrochemical impulse) and maintaining the sense of
balance(equilibrium).
PARTS OF EAR
 Human ear is divided into three parts that is:-
1. External ear
2. Middle ear
3. Inner ear

4. PARTS OF EAR
1. External ear:-It is consist of pinna and external auditory meatus.
2. Middle ear-
 Tympanic membrane (ear drum) or tympanum:-It is consists of skin(outside), connetive tissue (middle), and
mucous membrane (inner side).
 Eustachian tube:-It is also called pharyngotympanic tube. Its helps to equalization of pressure on two side of
tympanic membrane.
Ear ossicles :-It is also known as auditory ossicle
Maleus (Hammer)
Incus(Anvil)
Stapes(Stirrup)
Windows:-Oval windows
Rounded windows

6. Parts of human ear:-

8. 3. INNER EAR:-
 Vestibular apparatus:-It helps to equilibrium of the
body.
-It is consists of -
Otolith organ
Semicircular canal
Semicircular duct
 Cochlea:-It is consists of two membranes that is-
Reissner’s
Basilar

10. Cochlea:-
 There are tree cavity that is –
- Scala vestibuli
- Scala media
-Scala tympani
 Fluid present inside the Cochlea:-
-Perilymph:-present in the scalatympani and scala
vestibuli
-Endolymph:-present within scala media

12. Organ corti :-
 It is present above scala tympani or on the top of the basilar membrane
in the scala media.
 It is peripheral receptors of sense of hearing.
 Important components of organ of corti:-
-Rods of corti
-Hair cell
-Supporting cells
-Tectorial membraine

13. Nerve supply
of Ear cells:-
 Cochlear division of 8
cranial nerve.

14. THANK YOU TO
ALL