Identify the correct sequence of organs/ regions in the organization of human ear as an auditory mechanoreceptor organ

Options

A. Pinna - Auditory canal - Tympanic membrane - Malleus - incus - Stapes - cochlea - Auditory nerve
B. Pinna- Malleus- incus- stapes- auditory canal- tympanic membrane
C. Pinna - cochlea - Tympanic membrane - Auditory canal - Malleus - Stapes - Incus - Auditory nerve
D. Pinna - Tympanic membrane - Auditory canal - Incus - malleus - Stapes - Cochlea - Auditory nerve

Answer

To identify the correct sequence of organs/regions in the organization of the human ear as an auditory mechanoreceptor organ, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Parts of the Ear**: The human ear is divided into three main parts:
- External Ear
- Middle Ear
- Internal Ear

2. **Sound Wave Entry**: The process begins when sound waves enter the ear through the **pinna** (the outer part of the ear).

3. **External Auditory Canal**: After entering through the pinna, the sound waves travel through the **external auditory canal**.

4. **Tympanic Membrane**: The sound waves then reach the **tympanic membrane** (also known as the eardrum), causing it to vibrate.

5. **Ear Ossicles**: These vibrations are transmitted to the **ear ossicles** (three tiny bones in the middle ear), which are:
- Malleus (hammer)
- Incus (anvil)
- Stapes (stirrup)

6. **Amplification of Sound**: The ear ossicles amplify the sound vibrations before passing them on.

7. **Cochlea**: The amplified vibrations then travel to the **cochlea**, which is a fluid-filled structure in the inner ear.

8. **Organ of Corti**: Within the cochlea, the **Organ of Corti** converts these vibrations into neural signals.

9. **Auditory Nerve**: Finally, these signals are transmitted to the brain via the **auditory nerve**, where they are interpreted as sound.

### Correct Sequence:
- Pinna → External Auditory Canal → Tympanic Membrane → Malleus → Incus → Stapes → Cochlea → Auditory Nerve

### Conclusion:
The correct sequence of organs/regions in the organization of the human ear as an auditory mechanoreceptor organ is:
**Pinna → External Auditory Canal → Tympanic Membrane → Malleus → Incus → Stapes → Cochlea → Auditory Nerve**.

---