The papillae present on margins of the tongue:
**Core Concept**
The **lingual papillae** are small projections on the surface of the tongue, which play a crucial role in the sensation of taste and texture. These papillae contain **taste buds** that house **taste receptors**, responsible for detecting the five basic tastes. The different types of papillae are classified based on their location and function.
**Why the Correct Answer is Right**
The correct answer is related to the type of papillae found on the margins of the tongue. The **filiform papillae** are the most numerous type, but they are primarily found on the central surface of the tongue. The **fungiform papillae** are scattered over the anterior two-thirds of the tongue, including the margins. They contain **taste buds**, making them relevant for the sensation of taste.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the filiform papillae are primarily found on the central surface of the tongue and do not contain taste buds.
**Option B:** This option is incorrect as the circumvallate papillae are located at the back of the tongue.
**Option D:** This option is incorrect as the foliate papillae are located on the posterior lateral margins of the tongue, but are not the primary type found on the margins.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the different types of papillae have distinct functions and locations on the tongue. The **fungiform papillae** are scattered over the anterior two-thirds of the tongue, including the margins, and contain **taste buds**.
**Correct Answer:** C. Fungiform papillae.