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Page 1: Senses in the Skin

Senses in the Skin

Page 2: Senses in the Skin

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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Page 4: Senses in the Skin

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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Page 7: Senses in the Skin

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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Page 10: Senses in the Skin

Temperature Receptors (thermoreceptors)

• There are separate hot and cold receptors

• They are stimulated by sudden changes in temperature

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Page 12: Senses in the Skin

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!


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