Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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
Transcribed Image Text:**Human Skin Layers and Regions**
**2. Match the number on the figure to the specific skin layer or region that identifies it.**
**Image Description:**
The image presents a microscopic view of the human skin layers. The layers are labeled with numbers 1 through 4.
- **1:** The top layer which appears wavy due to ridges and folds, labeled to the right of the skin section.
- **2:** The second layer beneath the wavy top layer, extends from the end of layer 1 to the beginning of layer 3.
- **3:** The third layer located deeper within the skin structure.
- **4:** The fourth and deepest layer shown in the image.
**Names of Layers:**
- ____ Epidermis (outermost layer)
- ____ Dermis (layer below epidermis)
- ____ Papillary region (upper part of the dermis)
- ____ Reticular region (lower part of the dermis)
**Directions:**
Name the specific tissue type(s) that compose the epidermis, dermis, and hypodermis (subcutaneous layer).
**Skin Layer/Region:**
3. Epidermis
**Tissue Type(s):** _____________________________________________
4. Dermis:
- Papillary region
**Tissue Type(s):** _____________________________________________
- Reticular region
**Tissue Type(s):** _____________________________________________
5. Hypodermis (subcutaneous layer)
**Tissue Type(s):** _____________________________________________
**Graph/Diagram Explanation:**
The diagram is a highly magnified histological (microscopic) section of human skin, showing the organization of different layers. Each layer has distinct characteristics and functions:
- **Epidermis:** The outermost protective layer, composed mainly of keratinized stratified squamous epithelium.
- **Dermis:** Composed of two regions:
- **Papillary region:** The uppermost part of the dermis, containing thin collagen fibers, blood vessels, and sensory neurons. It often appears wavy or ridge-like.
- **Reticular region:** The denser, deeper part of the dermis, composed of thicker collagen fibers and elastic fibers providing strength and elasticity.
- **Hypodermis:** The deeper subcutaneous layer, not labeled in the image, primarily consisting of loose connective tissue and fat cells that provide insulation and cushioning.
This detailed view helps in
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