Free Nerve Endings are the simplest receptors.
eye, skin, ear and nose
There are not tow types of sensory receptors in the skin there are many types of sensory receptors in the skin i.e., in the CUTANEOUS RECEPTORS of the MECHANORECEPTORS. They are the: Meissner's...
Retina.
Touch. Sight-Eyes, Sound-Ears, Smell-Nose, Taste-Tongue, Touch-Skin