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Ch. 4 Skin and Body Membranes
Marieb - Essentials of Human Anatomy & Physiology 13th Edition
Marieb13th EditionEssentials of Human Anatomy & PhysiologyISBN: 9780135624340Not the one you use?Change textbook
All textbooksMarieb 13th EditionCh. 4 Skin and Body MembranesProblem 8
Chapter 4, Problem 8

Which of the following is not a skin structure?
a. Nerve fiber
b. Hair papilla
c. Hair
d. Nail

Verified step by step guidance
1
Step 1: Begin by understanding the anatomy of the skin and its associated structures. The skin is composed of three main layers: epidermis, dermis, and hypodermis. It also includes accessory structures such as hair, nails, and glands.
Step 2: Analyze each option provided in the question to determine whether it is a structure directly associated with the skin. For example, nerve fibers are part of the dermis and are involved in sensory functions, making them a skin structure.
Step 3: Consider the hair papilla. The hair papilla is located at the base of the hair follicle and is responsible for nourishing the hair. Since hair follicles are embedded in the dermis, the hair papilla is considered a skin structure.
Step 4: Evaluate the hair itself. Hair is an accessory structure of the skin that grows from follicles in the dermis, making it a skin structure.
Step 5: Examine the nail. Nails are keratinized structures that grow from the nail matrix, which is located in the epidermis. While nails are closely associated with the skin, they are considered separate appendages and not part of the skin itself.

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Key Concepts

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

Skin Structures

Skin structures refer to the various components that make up the skin and its appendages. These include the epidermis, dermis, and subcutaneous tissue, as well as hair follicles, sweat glands, and sebaceous glands. Understanding these structures is essential for identifying their functions and relationships within the integumentary system.
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Hair Anatomy

Hair anatomy encompasses the various parts of hair, including the hair shaft, hair follicle, and hair papilla. The hair papilla is a small, bulb-like structure at the base of the hair follicle that contains blood vessels and nerves, playing a crucial role in hair growth. Recognizing these components helps differentiate between structures that are part of the skin and those that are not.
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Nerve Fibers in the Skin

Nerve fibers in the skin are part of the sensory nervous system, responsible for transmitting sensations such as touch, pain, and temperature. While they are associated with the skin, they are not considered a structural component of the skin itself. This distinction is important for understanding the functional roles of various elements within the integumentary system.
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Related Practice
Textbook Question

Match the appropriate structure with the proper description and/or function.

1. Made of dense, irregular connective tissue

 2. Produce sebum

3. Helps regulate body temperature by producing sweat

4. Cause fingerprints

5. Houses the hair root

6. Superficial keratinized stratified squamous epithelium

7. Deep pressure receptors

8. Vascular layer that houses skin appendages

a. Dermal papillae

b. Lamellar corpuscles

c. Dermis

d. Hair follicle

e. Epidermis

f. Eccrine sweat gland

g. Reticular layer

h. Sebaceous glands

39
views
Textbook Question

Match the appropriate structure with the proper description and/or function.

1. Made of dense, irregular connective tissue

 2. Produce sebum

3. Helps regulate body temperature by producing sweat

4. Cause fingerprints

5. Houses the hair root

6. Superficial keratinized stratified squamous epithelium

7. Deep pressure receptors

8. Vascular layer that houses skin appendages

a. Dermal papillae

b. Lamellar corpuscles

c. Dermis

d. Hair follicle

e. Epidermis

f. Eccrine sweat gland

g. Reticular layer

h. Sebaceous glands

49
views
Textbook Question

Match the appropriate structure with the proper description and/or function.

4. Cause Fingerprints

a. Dermal papillae

b. Lamellar corpuscles

c. Dermis

d. Hair follicle

e. Epidermis

f. Eccrine sweat gland

g. Reticular layer

h. Sebaceous glands

875
views