Final answer:
Circumvallate papillae are surrounded by grooves, contain about 250 taste buds each, and are located in an inverted “V” pattern at the back of the tongue.
Step-by-step explanation:
The circumvallate papillae are surrounded by a groove or valley-like depression, and they are among the different types of papillae located on the tongue. As part of the gustatory system, these papillae are involved in the sensation of taste. Each circumvallate papilla contains about 250 taste buds, which are the specialized structures housing gustatory receptor cells. These papillae are wall-like in shape and arranged in the pattern of an inverted “V” at the back of the tongue. The grooves surrounding circumvallate papillae not only provide a distinctive structural feature but also create an area where saliva can gather and interact with food particles to enhance the taste sensation.