Integumentary System Lab Notes

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Last updated 7:28 PM on 6/27/26
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17 Terms

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<p>Integument</p>

Integument

Organ System

  • Skin

  • Glands

  • Small Muscles

  • Blood Vessels

  • Nerves

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Three major regions of Skin

  • Epidermis - outermost superficial region

  • Dermis - middle region

  • Hypodermis - deepest region (superficial fascia)

<ul><li><p>Epidermis - outermost superficial region</p></li><li><p>Dermis - middle region</p></li><li><p>Hypodermis - deepest region (superficial fascia)</p></li></ul><p></p>
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Thin Skin (keratinocytes)

Four layers (strata) are present all over body - hairy skin

Stratified squamous keratinizing epithelium

<p>Four layers (strata) are present all over body - hairy skin</p><p>Stratified squamous keratinizing epithelium</p>
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Thick Skin (keratinocytes)

Five layers (strata) found on palms of hands and soles of feet

<p>Five layers (strata) found on palms of hands and soles of feet </p>
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Thick vs Thin Skin

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Layers of the Dermis: Papillary Layer

  • Areolar connective tissue

  • Dermal papillae

  • Meisner’s corpuscles

<ul><li><p>Areolar connective tissue</p></li><li><p>Dermal papillae</p></li><li><p>Meisner’s corpuscles</p></li></ul><p></p>
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Dermis

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Layers of the Dermis: Reticular Layer

  • Dense irregular connective tissue

  • Collagen fibers

  • Elastin fibers

  • Pacinian (Lamellated) corpuscles

<ul><li><p>Dense irregular connective tissue</p></li><li><p>Collagen fibers</p></li><li><p>Elastin fibers</p></li><li><p>Pacinian (Lamellated) corpuscles</p></li></ul><p></p>
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Hypodermis

  • Subcutaneous layer deep to the skin

  • Composed of adipose and areolar connective tissue

<ul><li><p>Subcutaneous layer deep to the skin</p></li><li><p>Composed of adipose and areolar connective tissue</p></li></ul><p></p>
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Sebaceous Glands

  • Simple alveolar glands found all over the body

  • Soften skin when stimulated by hormones

  • Secrete an oily secretion called sebum

    • Discharge waxy sebum onto hair shaft when associated with hairs

    • Sebaceous follicles discharge into epidermal surface

<ul><li><p>Simple alveolar glands found all over the body</p></li><li><p>Soften skin when stimulated by hormones</p></li><li><p>Secrete an oily secretion called sebum</p><ul><li><p>Discharge waxy sebum onto hair shaft when associated with hairs</p></li><li><p>Sebaceous follicles discharge into epidermal surface</p></li></ul></li></ul><p></p>
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<p>Suderiferous Glands</p>

Suderiferous Glands

Apocrine sweat glands

  • Produce odorous secretion

  • Pheromones

Merocrine (eccrine) sweat glands

  • Sensible perspiration

<p>Apocrine sweat glands</p><ul><li><p>Produce odorous secretion</p></li><li><p>Pheromones</p></li></ul><p>Merocrine (eccrine) sweat glands</p><ul><li><p>Sensible perspiration</p></li></ul><p></p>
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Sweat Glands Drawn Diagram

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Sweat Glands Picture Diagram

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Hair Bulb Diagram

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Nail Diagram

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Full Skin Diagram

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Full Skin Diagram Picture

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