Papillae are small, raised bumps found on the surface of the tongue. They are responsible for providing texture to the tongue and are crucial for the sense of taste.

However, the term "papillae" can also refer to other structures in the body:

* Renal papillae: These are cone-shaped structures located in the kidneys, responsible for collecting urine.

* Dermal papillae: These are small, finger-like projections of the dermis that extend into the epidermis, providing blood supply and anchoring the epidermis to the dermis.

To give you a more specific answer, please tell me which type of papillae you're interested in.