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Chapter 5 Integumentary System.

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Presentation on theme: "Chapter 5 Integumentary System."— Presentation transcript:

1 Chapter 5 Integumentary System

2 Integumentary System Skin and its appendages
Hair Nails Sebaceous glands Sweat glands Integumentary means covering 3,000 square inches of surface area

3 Click Here to play Skin animation
Animation – Skin Click Here to play Skin animation

4 Functions of Skin Covering Regulate body temperature
Manufacture Vitamin D Nerve receptors

5 Functions of Skin Temporary storage Screen out ultraviolet radiation
Special absorptive properties

6 Structure of the Skin Epidermis Dermis Outermost covering Avascular
True skin Connective tissue Vascular

7 Structure of the Skin

8 Epidermal Cells Keratinocytes Merkel cells Melanocytes
Langerhans cells

9 Epidermal Layers Stratum germinativum Stratum spinosum
Stratum granulosum Stratum lucidum Stratum corneum

10 Dermis Also called corium Thicker, inner layer of the skin
Many nerve receptors Blood vessels and heat regulation

11 Subcutaneous Layer Also called hypodermal layer Lies under dermis
Not a true part of the integumentary system Attaches integumentary system to the surface muscles underneath

12 Appendages Hair Root shaft Outer cuticle layer Cortex Inner medulla
Hair follicle Arrector pili muscle

13 Appendages Nails Hard structures covering the dorsal surfaces of the last phalanges of the fingers and toes Nail bed or matrix Diseases and nail color

14 Appendages Sweat Glands
Also called sudoriferous glands Perspiration 99% water Perspiration is excreted through pores Under the control of the nervous system 500ml water lost per day through skin Ceruminous or wax glands

15 Sebaceous Glands Secrete sebum which is thick, oily substance
Sebum lubricates the skin, keeping it soft and pliable

16 Microorganisms Intact skin is the best way to protect itself against pathogens Most skin bacteria are associated with hair follicles and sweat glands Handwashing Most effective action to prevent spread of disease 20 seconds for washing hands 2-4 minutes for infectious material

17 Aging Becomes more fragile and dry Loss of elasticity
Less effective body temperature control Melanocytes decrease Physiological changes can impact self-worth

18 Disorders Skin Acne vulgaris Athlete’s foot Dermatitis
Common and chronic disorder of sebaceous glands Athlete’s foot Contagious fungal infection Dermatitis Inflammation of the skin

19 Disorders Skin Eczema Impetigo Psoriasis
Acute or chronic, noncontagious inflammatory skin disease Impetigo Acute, inflammatory, and contagious skin disease Psoriasis Chronic inflammatory skin disease (reddish patches covered by silvery-white scales)

20 Disorders Skin Ringworm Urticaria (hives) Boils (carbuncles)
Highly contagious fungal infection Urticaria (hives) Intensely itching wheals or welts Boils (carbuncles) Painful, bacterial infection of the hair follicles or sebaceous glands

21 Disorders Skin Rosacea Herpes
Common inflammatory disorder (chronic redness and irritation to the face) Herpes Viral infection which is usually seen as a blister

22 Disorders Skin Genital herpes Shingle (herpes zoster)
Virus which may appear as a blister in the genital area Shingle (herpes zoster) Skin eruption due to a virus infection of the nerve ending

23 Disorders Hair and Nails
Head lice Parasitic insects Ingrown nails Common nail problem

24 Disorders Hair and Nails
Fungal infections Infections of the nail Warts Viral infections that affect the skin surrounding or underneath the nail

25 Skin Cancer Basal cell carcinoma Squamous cell carcinoma
Malignant melanoma Skin and sun exposure

26 Burns Rule of nines First degree burns Second degree burns
Third degree burns

27 Skin Lesions Pressure ulcer (decubitus ulcers) Stage I Stage II
Stage III Stage IV

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