human
How does the octopus sense and feel with its tentacles?
assistant
The octopus has a special organ called a statocyst that allows it to sense and feel with its tentacles. This organ is located at the base of each tentacle, and is made up of tiny fluid-filled sacs that are connected to the nervous system. When an external force is applied to the statocyst, the fluid inside the sacs moves, causing the nerves in the sacs to send signals to the brain.