Which of these constitutes outer ear in human beings ?

Options

A. Anvil
B. Cochlea
C. Hammer
D. pinna

Answer

To determine which part constitutes the outer ear in human beings, we can follow these steps:

### Step 1: Understand the Structure of the Ear
The human ear is divided into three main parts: the outer ear, the middle ear, and the inner ear.

### Step 2: Identify the Parts of the Outer Ear
The outer ear primarily consists of two main components:
- **Pinna**: This is the visible part of the ear that collects sound waves.
- **Auditory Canal**: Also known as the ear canal, it channels sound waves from the pinna to the eardrum.

### Step 3: Analyze the Options
When presented with options, we need to identify which of them corresponds to the outer ear. The options might include:
- Pinna
- Auditory Canal
- Anvil
- Cochlea
- Hammer

### Step 4: Eliminate Incorrect Options
- **Anvil**, **Cochlea**, and **Hammer** are parts of the middle and inner ear.
- The **Anvil** and **Hammer** are part of the middle ear, while the **Cochlea** is part of the inner ear.

### Step 5: Confirm the Correct Options
The correct components that make up the outer ear are the **Pinna** and **Auditory Canal**.

### Conclusion
Thus, the parts that constitute the outer ear in human beings are the **Pinna** and **Auditory Canal**.

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