How does a planarian uses it head and its auricles?

Planarians use their head and auricles primarily for sensory perception. The head houses eyespots that detect light and help the organism navigate its environment, while the auricles, which are the ear-like structures on either side of the head, contain chemoreceptors that sense chemical cues in the water. This sensory information aids in locating food and avoiding predators. Together, these features enable planarians to interact effectively with their surroundings.