Textbook Question
Which epidermal cell type is most numerous?
a. Keratinocyte
b. Melanocyte
c. Dendritic cell
d. Tactile epithelial cell
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5. Integumentary System
The Epidermis: Cells
1:45 minutesProblem 9h
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
Verified step by step guidance1
Step 1: Understand the question by identifying the key terms. The problem asks to match the structure with the description 'vascular layer that houses skin appendages.' Key terms include 'vascular layer' and 'skin appendages.'
Step 2: Recall the anatomy of the skin. The skin consists of two main layers: the epidermis (outer layer) and the dermis (inner layer). The dermis is vascularized, meaning it contains blood vessels, while the epidermis is avascular.
Step 3: Identify what 'skin appendages' refer to. Skin appendages include structures such as hair follicles, sebaceous glands, eccrine sweat glands, and lamellar corpuscles. These appendages are typically located within the dermis.
Step 4: Narrow down the options based on the description. The vascular layer that houses skin appendages is the dermis, specifically the reticular layer of the dermis, which contains most of these appendages.
Step 5: Match the correct options. Based on the description, the correct answers are likely 'c. dermis' and 'g. reticular layer,' as these are the vascular layers that house skin appendages.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Dermis
The dermis is the thick layer of skin located beneath the epidermis, composed of connective tissue. It contains blood vessels, nerves, and skin appendages such as hair follicles and glands. The dermis is crucial for providing structural support and elasticity to the skin, as well as housing various sensory receptors.
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Skin Appendages
Skin appendages include structures such as hair follicles, sebaceous glands, and sweat glands that originate from the epidermis and extend into the dermis. These appendages play vital roles in thermoregulation, lubrication, and protection of the skin. Understanding their functions helps in recognizing how the skin maintains homeostasis.
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Reticular Layer
The reticular layer is the deeper part of the dermis, characterized by dense irregular connective tissue. It provides strength and elasticity to the skin and contains larger blood vessels, nerves, and the roots of hair follicles. This layer is essential for the overall integrity and resilience of the skin.
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