The skin: The skin of a platypus is very leathery and tough. It is also covered in a layer of mucus that helps to keep it moist. The skin of a platypus is very sensitive to touch and temperature changes.
The beak: The beak of a platypus is made of a soft and flexible material called keratin. The beak is used for digging in the mud and catching food. The beak is also very sensitive to touch.
The claws: The claws of a platypus are very sharp and strong. They are used for digging, climbing, and hunting for food. The claws are also very sensitive to touch.
The tail: The tail of a platypus is long and flat. It is used for swimming and for storing fat. The tail is also very sensitive to touch.