Papillae are small, nipple-like structures found on the surface of the tongue and other parts of the body. They play a crucial role in the sense of taste by housing taste buds, which detect different flavors. There are several types of papillae, including fungiform, foliate, and circumvallate, each serving a specific function in taste perception. In addition to their role in taste, papillae can also be found in other areas, such as the skin and the lining of the mouth. In these locations, they help with sensory functions and can contribute to the texture and feel of surfaces.