Draw a well labelled diagram of the membranous labyrinth

Basic Biology (10)

1. Draw a well labelled diagram of the membranous labyrinth found in the inner ear.
2. Based on the diagram drawn above in (i) give a suitable term for each of the following descriptions:
   1. The sensory cells that helps in hearing.
   2. The part that is responsible for static balance of the body.
   3. The membrane covered opening that connects the middle ear to the inner ear.
   4. The fluid present in the middle chamber of cochlea.
   5. The structure that maintains dynamic equilibrium of the body.

Answer

i.

3 semicircular canals shown, coils of cochlea

Labelling: semicircular canals, utriculus, ampulla, oval window, round window Sacculus, cochlea

ii.

1. Organ of corti/ spiral organ
2. Utriculus and sacculus.
3. Oval window / round window
4. Endolymph
5. Semi-circular canal

• Exam Year: 2016