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प्रश्न
The figure given below shows the principal parts of a human ear. Study the diagram and answer the following questions.
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- Label the parts 1 to 8.
- State the role of parts 6, 7 and 8.
- Why is it harmful to use a sharp object to remove ear wax? Mention the number and name of the part involved.
उत्तर
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- Pinna
- Ear drum
- Ear canal
- Hammer
- Semi-circular canal
- Cochlea
- Vestibular portion of auditory nerve.
- Eustachian Tube
- Part 6 (Cochlea): It contains sensory cells for hearing.
Part 7 (Auditory Nerve): It transmits the impulse of hearing to the brain.
Part 8 (Eustachian Tube): It equalises air pressure on both sides of the tympanum. - Sharp objects may damage the (part 3) ear drum and cause deafness. Deafness can result from eardrum or tympanic ruptures.
संबंधित प्रश्न
Draw labelled diagrams of the following: Ear
Which part of our body helps us in maintaining the body balance?
(i) Draw a well labelled diagram of the membranous labyrinth found in the inner ear.
(ii) 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.
Briefly explain the following terms: Power of accommodation
the biological/technical terms for a thin membrane covering the entire front part of the eye.
Name the following:
The nerves which transmit impulse from ear to the brain.
State whether the following statements are true (T) or false (F). If false, correct them by changing any one single word in each.
Semi-circular canals are concerned with static (positional) balance.
Mention if the following statement is true (T) or false (F) Give reason.
Malleus incus and stapes are collectively called the ear ossicles.
What is the biological term for the three small bones present in the middle ear collectively?
State the functions of the following:
Semi-circular canals
State the Function:
Endolymph
Choose the Odd One Out:
The part of the ear that turns pressure variations into electrical signals is ______.
The part of the ear that collects the sound from the surroundings is ______.
The Eardrum moves inward when a rarefaction reaches it.
Given below is a diagrammatic representation of a part of the human ear.
- Name the parts numbered 1-6.
- Which parts of the ear shown here are complete.
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Which of the following structures equalises the air pressure on either side of the tympanum?
Define the following term:
Ear ossicles
