Question

______________consists of a group of lymphoid organs and acts as the first line of defence against the microbes entering through the oral and nasal passage.

• A. Pharynx
• B. Waldeyer’s ring
• C. Mouth
• D. Oesophagus

Answer 1

The correct option is B Waldeyer’s ring

Waldeyer’s ring consists of a group of lymphoid organs and acts as the first line of defence against the microbes entering through the oral and nasal passage.
It consists of a group of tonsillar tissues around the nasopharynx and oropharynx. The different tonsillar tissues are - pharyngeal tonsil (adenoid tonsil), tubals tonsil, palatine tonsils, and lingual tonsils.
Pharyngeal tonsil is located at the roof of the nasopharynx.
Tubal tonsils are located in the lateral wall of the nasopharynx.
Palatine tonsils are located in the oropharynx region.
Lingual tonsils are present at the back of the tongue.