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The Integumentary System

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Presentation on theme: "The Integumentary System"— Presentation transcript:

1 The Integumentary System
Chapter 3: Membranes and the Integumentary System Lesson 3.2 The Integumentary System

2 Functions of the Integumentary System
protects against abrasion chemical damage drying out UV radiation damage regulates body temperature

3 Functions of the Integumentary System

4 Anatomy of the Skin epidermis dermis hypodermis

5 Layers of the Epidermis

6 Review and Assessment True or False?
1. The dermis is the superficial layer of the skin. 2. The skin helps regulate body temperature. 3. The epidermis has three layers. 4. The hypodermis is above the dermis. 5. The skin protects against UV radiation.

7 Epidermal Cells keratinocytes epidermal dendritic cells Merkel cells
makes keratin, form layers of epidermis epidermal dendritic cells ward off infections Merkel cells touch receptors

8 Dermis dense, fibrous connective tissue papillary layer
forms fingerprints reticular layer

9 Hypodermis fibrous connective tissue adipose tissue padding insulation
energy storage

10 Appendages of the Skin sudoriferous (sweat) glands sebaceous glands
eccrine apocrine sebaceous glands hair nails

11 Review and Assessment Fill in the blanks with: hypodermis, keratinocytes, sweat, or papillary. 1. Eccrine is a type of _______________ gland. 2. _______________ produce keratin. 3. Adipose tissue is found in the _______________. 4. The _______________ of the dermis forms fingerprints.

12 Hair Follicle

13 Hair basics Shape of follicle = hair texture Color based on melanin
Straight = round Wavy = oval flat = curly Color based on melanin (eumelanin, pheomelanin) The Truth about Gingers!

14 Nail

15 Injuries and Disorders of the Skin
Chapter 3: Membranes and the Integumentary System Lesson 3.3 Injuries and Disorders of the Skin

16 Injuries of the Skin decubitus ulcers burns bedsores
caused by restricted blood supply burns first-, second- or third-degree caused by heat, chemicals, electricity or UV radiation Suzanne Tucker/, JTeffects/, Naiyyer/

17 Name that Burn

18 This Burn!

19 That Burn!

20 Rule of 9’s 9% for both anterior/posterior of head/neck
18% for anterior and 18% of posterior of torso 9% for a/p of EACH arm 18% for a/p of EACH leg 1% groin region Adds up to 100%

21 Problem Smokey Susie fell asleep in bed with a bottle of Jack, which spilled all over her, then was ignited with her cigar. She had burns on her anterior and posterior right arm, entire head/neck, anterior torso, as well as anterior right leg. How badly was Susie singed? Answer: = 45%

22 Grafting of Skin Split-thickness skin graft
2 top layers of from epidermis, & dermis Graft from hidden donor site Held with a dressing, staples, small stitches. Covered 3 to 5 days.

23 © Goodheart-Willcox Co., Inc.

24 Infections of the Skin and Membranes
viral infections herpes varicella herpes zoster herpes simplex virus type 1 or type 2 human papillomavirus warts Maksym Bondarchuk/

25 Infections of the Skin and Membranes
fungal infections athlete’s foot jock itch ringworm toenail fungus bacterial infections Impetigo – staph infection cellulitis

26 Inflammatory Conditions of the Skin
psoriasis involves redness and irritation Kenxro/

27 Cancers of the Skin basal cell carcinoma squamous cell carcinoma
Most common, most curable (grows slow) Overproducing cells in stratum basale squamous cell carcinoma Grows quickly, can spread Spiny layer

28 Cancers of the Skin malignant melanoma ABCD rule Most serious
Fleshy, colored, irregular ABCD rule Normal mole

29 Skin Part TWO

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