Ch. 5 The Integumentary System

Marieb - Human Anatomy & Physiology 11th Edition

Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Not the one you use?Change textbook

Marieb, Hoehn 11th Edition

Ch. 5 The Integumentary System

Problem 26

Chapter 5, Problem 26

Mrs. Gaucher received second-degree burns on her abdomen when she dropped a kettle of boiling water. She asked her doctor (worriedly) if she would need a skin graft. What do you think he told her?

Verified step by step guidance

Step 1: Understand the classification of burns by degree. First-degree burns affect only the epidermis, second-degree burns affect the epidermis and part of the dermis, and third-degree burns extend through the entire dermis and possibly deeper tissues.

Step 2: Recognize that second-degree burns typically cause blistering, redness, and pain because they damage the epidermis and part of the dermis but leave some dermal structures intact.

Step 3: Know that because some dermal tissue remains in second-degree burns, the skin can often regenerate on its own without the need for a skin graft, as the remaining dermis contains cells necessary for healing.

Step 4: Contrast this with third-degree burns, where the damage is so extensive that the skin cannot regenerate properly, often necessitating a skin graft to restore the skin barrier.

Step 5: Conclude that the doctor likely reassured Mrs. Gaucher that, since her burns were second-degree, she probably would not need a skin graft and that her skin should heal with proper care and treatment.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Second-Degree Burns

Second-degree burns affect both the outer layer (epidermis) and the underlying layer (dermis) of the skin. They typically cause redness, swelling, blistering, and pain. These burns usually heal within 2-3 weeks without scarring if properly treated, but deeper second-degree burns may require more intensive care.

Skin Grafting

Skin grafting is a surgical procedure where healthy skin is transplanted to cover areas of damaged or missing skin. It is often necessary for deep burns that cannot heal on their own or when large areas of skin are lost. For superficial or moderate second-degree burns, skin grafts are usually not required.

Burn Treatment and Healing Process

Treatment of second-degree burns involves cleaning, protecting the wound, and preventing infection. Proper wound care promotes natural healing by the skin’s regenerative capacity. Most second-degree burns heal without surgery, but monitoring is essential to decide if grafting is needed for deeper or infected wounds.

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Textbook Question

Why are there no skin cancers that originate from stratum corneum cells?

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Textbook Question

Explain each of these familiar phenomena in terms of what you learned in this chapter:

a. Pimples

b. Dandruff

c. Greasy hair and 'shiny nose

d. Stretch marks from gaining weight

e. Freckles

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Textbook Question

Count Dracula, the most famous vampire, rumored to have killed at least 200,000 people, was based on a real person who lived in eastern Europe about 600 years ago. He was indeed a “monster,” although he was not a real vampire. The historical Count Dracula may have suffered from which of the following?

(a) Porphyria

(b) EB

(d) Vitiligo

Explain your answer.

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