Meissner S Corpuscle

Cutaneous Sensory Receptors

Free nerve endings Hair shaft

Meissner's corpuscle a H

Melanocyte Arrector muscle of hair Sebaceous gland Cuticle

Internal sheath

External sheath

Glassy membrane

Connective tissue layer

Hair cuticle Sweat gland Hair matrix Papilla of hair follicle

Stratum corneum

Basal epithelial cells

Cytoplasmic protrusion

Mitochondria

Expanded axon terminal

Free nerve endings Hair shaft

Meissner's corpuscle

Stratum corneum

Hair cuticle Sweat gland Hair matrix Papilla of hair follicle

Merkel Disc Skin

Desmosomes

Merkel cell

Lobulated nucleus

Granulated vesicles

Schwann cell

Pacinian corpuscle

Artery

Vein

Sensory nerves

Elastic fibers

Detail of Merkel's disc Skin ligaments

Desmosomes

Cytoplasmic protrusion

Merkels Disc

Mitochondria

Expanded axon terminal

Merkel cell

Lobulated nucleus

Granulated vesicles

Schwann cell

Axon' Schwann cells Detail of free nerve ending

Figure 2.23 Skin and Cutaneous Receptors __

Cutaneous receptors respond to touch (mechanoreceptors), pain (nociceptors), and temperature (thermoreceptors). Several different types of receptors are present in skin. Meissner's corpuscles have small receptive fields and respond best to stimuli that are applied at low frequency (i.e., flutter). The pacinian corpuscles are located in the subcutaneous tissue and have large receptive fields. They respond best to high-frequency stimulation (i.e., vibration). Merkel's discs have small receptive fields and respond to touch and pressure (i.e., indenting the skin). Ruffini's corpuscles have large receptive fields, and they also respond to touch and pressure. Free nerve endings respond to pain and temperature.

Cutaneous Receptors: Pacinian Corpuscle

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Responses

  • ANNA
    What are merkel discs?
    7 years ago
  • Taimi Pitk
    How Meissner’s corpuscle and Merkel’s disk are alike?
    7 years ago
  • TEWELDE
    Are meissner corpuscles in the stratum corneum?
    4 years ago

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