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The Integumentary System. SKIN HAIR NAILS. Skin Diagram. Draw and color a cross-section diagram of the skin. Label and briefly describe each of the following structures: Epidermis Artery Dermis Vein Subcutaneous fascia Hair follicle Sebaceous gland Hair shaft

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skin diagram
Skin Diagram

Draw and color a cross-section diagram of the skin. Label and briefly describe each of the following structures:

Epidermis Artery

Dermis Vein

Subcutaneous fascia Hair follicle

Sebaceous gland Hair shaft

Sudoriferous gland Arrector pili muscle

Nerve Pores

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Sebaceous (oil) gland

Pore

Hair

Epidermis

Sudoriferous (sweat) gland

Dermis

Nerve

Sub-cutaneous fascia

Artery

Hair follicle

Arrector pilli muscle

Vein

functions of the skin
Functions of the Skin
  • Protection

- From ultraviolet rays and pathogens

- Holds moisture in

  • Sensory Perception

- Pain, pressure, temperature, and touch

  • Body Temperature Regulation

- Blood vessels dilate to release heat and

constrict to conserve heat

- Cool body through evaporation of sweat

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Storage

- Fat, glucose, water, vitamins, and salts

  • Absorption

- Some medications

  • Excretion

- Salt, excess water, and some wastes eliminated through the sweat

  • Production

- Produces Vitamin D

pigmentation
Pigmentation
  • Melanin: a brownish-black pigment
  • Carotene: a yellowish-red pigment

* The amounts of these two pigments determine a person’s skin color

abnormal colors of the skin
Abnormal Colors of the Skin
  • Albino : the absence of pigmentation
  • Erythema : reddish color of skin
  • Jaundice : yellow discoloration of skin
skin eruptions
Skin Eruptions
  • Macules : flat spots on the skin
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Papules : firm raised areas
  • Vesicles : fluid-filled sacs or blisters
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Pustules : pus-filled sacs
  • Crusts : areas of dried pus and blood (scabs)
decubitus ulcers bedsores
Decubitus Ulcers(Bedsores)
  • Open sores in the skin and underlying tissues due to pressure over a bony area
  • Cuts off the blood supply and the tissue dies
diseases
Diseases

Acne : an inflammation of the sebaceous glands

- Caused by a blockage of the hair follicles with dirt, cosmetics, excess oil, and/or bacteria

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Verrucae : rough, hard, elevated, rounded surface forms on the skin - warts

- Caused by a viral infection of the skin

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Skin Cancers :

- Forms that are usually localized – don’t spread to other areas of body

Basal cell carcinomaSquamous cell carcinoma

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Skin Cancers
  • Form that CAN spread to other parts of the body and be fatal

Malignant Melanoma

signs of malignant melanoma
Signs of Malignant Melanoma

Asymmetrical in shape

Borders of lesion are scalloped or irregular

Colors are varied – black, brown, white, red

Diameter is larger than a pencil eraser