The reason the hypodermis acts as a shock absorber is that:

• A. it is composed primarily of dense irregular connective tissue
• B. it has a high concentration of collagen fibers
• C. it contains a large amount of adipose tissue
• D. it is rich in blood vessels and nerves

Answer: (C)

Verified step by step guidance

1. Understand the structure and function of the hypodermis: The hypodermis, also known as the subcutaneous layer, is the deepest layer of the skin. It primarily consists of adipose tissue and connective tissue, which play key roles in insulation, energy storage, and shock absorption.
2. Analyze the properties of adipose tissue: Adipose tissue is specialized for storing fat. Its composition includes fat cells (adipocytes) that are surrounded by a matrix. The fat within these cells provides cushioning and absorbs mechanical forces, making it an effective shock absorber.
3. Compare the options provided: Dense irregular connective tissue is primarily responsible for providing strength and resistance to stretching, not shock absorption. Collagen fibers contribute to structural integrity but do not serve as shock absorbers. Blood vessels and nerves are important for nutrient delivery and sensory functions but do not directly contribute to shock absorption.
4. Identify the correct answer based on the function of adipose tissue: Since adipose tissue is designed to cushion and absorb mechanical forces, the correct answer is that the hypodermis acts as a shock absorber because it contains a large amount of adipose tissue.
5. Conclude the reasoning: The hypodermis's composition of adipose tissue is key to its role in shock absorption, as the fat stored in adipocytes provides the necessary cushioning to protect underlying structures from mechanical stress.