Which connective tissue forms the supporting framework of the liver, spleen, and lymph nodes?

RRB Nsg. Superintendent - 29 April 2025 (Shift-3rd)

Applied Anatomy

Easy

Appeared in: RRB Nsg. Superintendent - 29 April 2025 (Shift-3rd)

Explanation

Reticular connective tissue is composed of special, fine collagen fibers (Type III collagen) known as reticular fibers.
These fibers form a delicate, branching network or mesh called a 'reticulum' or 'stroma'.
This stroma acts as the internal supporting framework for soft, solid organs, particularly those of the lymphoid system like the spleen and lymph nodes, as well as the liver and bone marrow.
The framework supports the organ's functional cells (parenchyma), such as lymphocytes and hepatocytes.

Option A: Brown adipose tissue is a specialized fat tissue whose primary function is to generate heat (non-shivering thermogenesis). It does not provide a structural framework for organs.
Option B: White adipose tissue is the body's main energy reserve, providing insulation and cushioning for organs. It does not form the internal stroma or supporting meshwork of organs like the liver or spleen.
Option D: Areolar connective tissue is the most widely distributed connective tissue, acting as a general 'packing material' that binds other tissues together and holds organs in place. It is not the specialized internal framework of lymphoid organs.

Visual 1: Microscopic Diagram - A slide showing reticular tissue with its characteristic dark-staining, web-like reticular fibers forming the stroma of a lymph node, with lymphocytes scattered within the mesh. This helps visualize the 'framework' concept.
Visual 2: Comparative Chart - A chart illustrating the four main types of connective tissue proper (loose, dense, reticular, adipose) with images and key functions for each, allowing for easy comparison.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Types and functions of connective tissues as background academic context rather than a clinical decision trigger.
Understanding the reticular framework is crucial in pathology. In conditions like liver cirrhosis, the delicate reticular fiber network is replaced by thick, coarse collagen bundles (fibrosis), which disrupts liver architecture and function.
In the spleen and lymph nodes, the reticular stroma is essential for immune cell trafficking and interaction. Damage to this framework can impair immune responses.
What if? - If a patient develops myelofibrosis, the reticular framework in the bone marrow becomes scarred and fibrotic. This would disrupt hematopoiesis (blood cell production), leading to anemia, fatigue, and an enlarged spleen as the spleen tries to take over blood cell production.

How to Approach the Question

First, identify the keywords in the question: 'connective tissue', 'supporting framework', and the specific organs 'liver, spleen, and lymph nodes'.
The term 'supporting framework' (or stroma) is a key functional clue.
Recall the major types of connective tissue and their primary functions.
Evaluate each option: Adipose tissue is for fat storage/heat. Areolar tissue is a general 'filler' or packing material.
Recognize that 'reticular' means 'net-like', which directly relates to the concept of a framework.
Match the function of forming a delicate, net-like framework to the specific tissue type, which is reticular connective tissue, known to be the stroma of lymphoid organs and the liver.

Concept Tested & Keywords

Concept Tested: Types and functions of connective tissues
Stem keywords: connective tissue, supporting framework, liver, spleen, lymph nodes
Lead-in keywords: Which

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