Question

Arrange the following in logical sequence.
Oval window, tympanum, Cochlea, Auditory canal, ear ossicles (path through which the vibration of sound is transferred in the human ear)

Answer 1

Hint: The above parts are given in the question are the important parts of the eye that aids in hearing. The ear is the main organ of hearing in which the sound is converted into electrochemical impulses. The sound is received/gathered by the external ear, transmitted as vibration in the middle ear and further processed in the inner ear.

Complete answer:
To answer this question, we must know the structure of the ear and the pathway through which the sound travels.
The ear is the main organ of hearing and balance. It is divided into three parts-
- The external ear: It consists of the external muscular pinna and the auditory canal. It gathers sound and focuses on the eardrum.
- Middle ear: It consists of the eardrum or tympanum and ear ossicles (malleus, incus and stapes. It opens in the inner ear through an oval window. The gathered sound is converted into vibrations by the tympanum and is transmitted to the inner ear through ear ossicles.
- Inner ear: The oval window is the membranous opening between the middle and inner ear. Through the oval window, vibrations are conducted in the inner ear. It comprises the cochlea which is the main centre for processing vibrations and the semicircular canal which helps in maintaining the dynamic balance of the body.

From the above structure, we can conclude that the sound travels from the auditory canal, tympanum, ear ossicles and through an oval window reaches the cochlea. The detailed structure of the ear is given below.

Note: The cochlea is made up of a bony labyrinth and the cochlear duct. It is coiled in shape and looks like the shell of a snail. The cochlear duct has sensory and supporting cells which are known as organs of Corti. This region is sensitive to various wavelengths of sound.