Which is component of Waldeyer's ring

Options

A. Pharynx
B. Tonsils
C. Ileum
D. Oesophagus

Answer

### Step-by-Step Solution:

1. **Understanding Waldeyer's Ring**:
- Waldeyer's ring is a collection of lymphatic tissues located in the pharynx and oral cavity. It is arranged in a ring-like structure and plays a crucial role in the immune response by trapping pathogens entering through the mouth and nose.

2. **Identifying the Components**:
- The components of Waldeyer's ring include:
- **Pharyngeal Tonsils**: Located on the posterior wall of the pharynx. They may become enlarged in children, a condition known as adenoids.
- **Tubal Tonsils**: Situated around the Eustachian tubes, which connect the pharynx to the middle ear.
- **Palatine Tonsils**: Located on either side of the oropharynx, attached to the palate. They are commonly involved in infections, leading to tonsillitis.
- **Lingual Tonsils**: Found at the base of the tongue, specifically on the pharyngeal part of the tongue.

3. **Excluding Other Options**:
- The question asks for components of Waldeyer's ring. It is important to note that the pharynx, ileum, and esophagus are not components of Waldeyer's ring, as they are not lymphatic tissues.

4. **Conclusion**:
- The correct answer to the question "Which is a component of Waldeyer's ring?" is the tonsils mentioned above, specifically the **pharyngeal tonsils, tubal tonsils, palatine tonsils, and lingual tonsils**.