Category B - full version without watermark 720x576 (check terms and conditions at The version with watermark is for free to embed The skin is a highly specialized sensory organ. It contains receptors for pain, pressure, cold and heat. The receptors detect stimuli and transmit them to the brain. The Meissner's corpuscle is sensitive to touch. It helps us to perceive the surface structure and dimensions of objects. This is particularly important with very small objects. Meissner's corpuscles react above all to pressure changes within the skin. They hardly respond to constant pressure.