Which part among the following is not involved in hearing?

Options

A. Otolith organ
B. Tympanum
C. Organ of corti
D. Ear ossicles

Answer

To solve the question "Which part among the following is not involved in hearing?", we need to analyze the options provided and understand the anatomy of the ear and its functions. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Anatomy of the Ear
The ear is divided into three main parts: the outer ear, the middle ear, and the inner ear. The inner ear contains structures essential for both hearing and balance.

### Step 2: Identify the Structures Involved in Hearing
In the inner ear, the cochlea is the primary structure responsible for hearing. It converts sound vibrations into nerve impulses. The vestibular system, which includes the semicircular canals and otolith organs, is primarily responsible for balance and spatial orientation, not hearing.

### Step 3: Analyze the Options
1. **Otolith Organ**: Part of the vestibular system, responsible for balance (not involved in hearing).
2. **Tympanum**: Also known as the eardrum, it is involved in hearing as it vibrates in response to sound waves.
3. **Organ of Corti**: Located within the cochlea, it is the sensory organ for hearing.
4. **Utricle**: Part of the vestibular system, involved in balance (not involved in hearing).

### Step 4: Determine the Correct Answer
From the analysis:
- The **Otolith Organ** is not involved in hearing.
- The **Tympanum**, **Organ of Corti**, and **Utricle** are involved in hearing or balance.

Thus, the correct answer is **Otolith Organ**.

### Final Answer
The part that is not involved in hearing is **Otolith Organ**.

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