Part of skin which contains sweat glands, nerve endings and blood capillaries is?

IGNOU Post B. SC. Nursing entrance -2021

Applied Anatomy

Easy

Appeared in: IGNOU Post B. SC. Nursing entrance -2021

Explanation

The dermis is the middle layer of the skin, located between the epidermis and the subcutaneous tissue.
It is a connective tissue layer that contains a rich supply of blood vessels (capillaries), nerve endings for sensation, and skin appendages.
Specifically, sweat glands, which are crucial for thermoregulation, and their ducts are housed within the dermis.

Option A: The epidermis is the outermost layer and is avascular, meaning it lacks blood capillaries. While it has some nerve endings, it does not contain sweat glands.
Option C: The subcutaneous fat layer (hypodermis) is primarily for insulation and energy storage. While larger blood vessels and nerves pass through it, the dense network of capillaries and glands are located in the dermis above it.
Option D: Sebaceous glands are structures, not a layer of the skin. They are located within the dermis and secrete oil (sebum).

Clinical Relevance

Nursing practice connection: Knowing Anatomy and Physiology of the Skin helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding the layers of the skin is fundamental for many nursing procedures. For example, intradermal injections (like a PPD test) are administered into the dermis because of its slow absorption rate and local reaction visibility.
Nurses assess skin integrity by observing changes in the epidermis and dermis. A break in the epidermis can lead to infection, while damage to the dermis can affect blood supply and nerve function, leading to pressure injuries (bedsores).
What if? If a patient has a second-degree burn, it involves damage to both the epidermis and the dermis. This explains why these burns are painful (due to exposed nerve endings in the dermis), blister (due to fluid accumulation between the layers), and are at high risk for infection.

How to Approach the Question

First, identify the key terms in the question: 'sweat glands', 'nerve endings', and 'blood capillaries'.
Recall the basic structure of the skin, which consists of three main layers: epidermis, dermis, and hypodermis (subcutaneous tissue).
Systematically evaluate each option based on your knowledge of skin anatomy.
Eliminate 'Epidermis' because it is avascular (no blood capillaries).
Eliminate 'Sebaceous glands' as they are a specific structure within a layer, not a layer itself.
Differentiate between the 'Dermis' and 'Subcutaneous fats'. The dermis is the primary location for most of the skin's functional components, while the subcutaneous layer is mainly fat for insulation.

Concept Tested & Keywords

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