Senses in the Skin
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Transcript of Senses in the Skin
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Senses in the Skin
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Senses in the Skin
• There are several different types of sensory nerve endings in the skin
• These endings are called receptors because they are the parts of the nervous system from which information is received
• The receptors are named according to their function
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Touch Receptors (Meissner’s corpuscles)
• Located immediately below the epidermis
• Most numerous in the tongue and fingers
• They are stimulated by light pressure on the skin
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• Allow a person to distinguish between rough, smooth, hard and soft
• A different touch receptor detects hair movement
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Pressure Receptors (Pacinian corpuscle)
• Located beneath the dermis
• Stimulated by heavy pressure
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Pain Receptors (Nociceptor)
• Located in the epidermis and dermis
• Evenly distributed throughout the skin
• They occur almost everywhere throughout the body except the brain– This is why we can be awake during brain
surgery and still feel sensation, but no pain
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Temperature Receptors (thermoreceptors)
• There are separate hot and cold receptors
• They are stimulated by sudden changes in temperature
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Sweat Glands
• Adults have over 2 million sweat glands
• There are two types:
1. The first kind is found everywhere on the body except on the lips. They produce a watery solution of salt and urea which evaporates from the skin and cools the body
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2. The second kind is found under the arms and in the groin area. They produce a thicker liquid. The bacteria on your skin feed off this and produce substances that stink!