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Related Concept Videos

Connective Tissue Cell Types01:22

Connective Tissue Cell Types

Connective tissue develops from the mesoderm of a developing embryo and consists of cells, fibers, and ground substance: a gel-like material containing large complexes of carbohydrates and proteins. Connective tissue was first identified as a separate tissue family in the 18th century, and Johannes Peter Muller coined the term connective tissue.
Fat cells (adipocytes), smooth muscle cells (myoblasts), and bone cells (osteoblasts) are some connective tissue cell types. Some immune system cells...
Introduction to Connective Tissues01:11

Introduction to Connective Tissues

Connective tissues are one of the four main tissue types in humans that are extensively present in the body. They are characterized by cells embedded in an extracellular matrix (ECM) composed of a ground substance and three main types of protein fibers— collagen, elastic, and reticular fibers. The ground substance of connective tissues can range from a watery and jelly-like consistency to mineralized and hard. The wide variety of cells in the connective tissues include fibroblasts, osteocytes,...
Functions of Connective Tissues01:17

Functions of Connective Tissues

Connective tissues perform a broad range of functions in the body. Their primary function is to connect and link different tissues in the body and act as packaging material between tissues. The areolar tissue, a connective tissue prototype, commonly cements various tissue types in diverse body organs. In contrast, adipose tissue cushions internal organs while insulating the body from heat loss.
Hard connective tissues, such as bones and cartilage, provide structure and support to the body.
Tissue Transplantation01:24

Tissue Transplantation

Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
The Biology of Tissue Transplantation
The biology of tissue transplantation hinges on the Major Histocompatibility Complex (MHC) molecules. These molecules...
Overview of Connective Tissues Proper01:25

Overview of Connective Tissues Proper

Connective tissue proper is a class of connective tissue that encompasses all mature connective tissues except bone, cartilage, blood, and lymph. This extensive class of tissues has two subclasses — loose and dense connective tissues — classified based on the protein fiber arrangement and the amount of ground substance. 
The loose connective tissues have a meshwork of thin collagen and elastin fibers, which provide tensile strength for support and enough elasticity to move cells. They have...
Classification of Connective Tissues01:30

Classification of Connective Tissues

The connective tissues have different properties and functions in the human body. They are broadly categorized into proper, supporting, or fluid connective tissues.
Connective Tissue Proper
Connective tissue proper is the most abundant class of connective tissues. As its name implies, it predominantly connects different tissues in the body. Depending on the cell types, ground substance, viscosity, and fiber types in the ECM, connective tissue proper is further categorized into loose and dense.

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Related Experiment Video

Updated: May 9, 2026

Engineering Tendon Assembloids to Probe Cellular Crosstalk in Disease and Repair
08:32

Engineering Tendon Assembloids to Probe Cellular Crosstalk in Disease and Repair

Published on: March 22, 2024

Latest advances in connective tissue disorders.

Vijay Rao1, Simon Bowman

  • 1Rheumatology Department, Queen Elizabeth Hospital Birmingham, Birmingham, UK.

Therapeutic Advances in Musculoskeletal Disease
|August 2, 2013
PubMed
Summary

Connective tissue disorders involve immune dysfunction and autoantibody production. Advances focus on targeted therapies, particularly B-cell depletion, and exploring the innate immune system for new treatments.

Keywords:
MyositisMyositis specific antibodiesSjogren’s syndromeSystemic Lupus Erythematosusantiphospholipid antibody syndromenew therapies in connective tissue disordersscleroderma

Related Experiment Videos

Last Updated: May 9, 2026

Engineering Tendon Assembloids to Probe Cellular Crosstalk in Disease and Repair
08:32

Engineering Tendon Assembloids to Probe Cellular Crosstalk in Disease and Repair

Published on: March 22, 2024

Area of Science:

  • Rheumatology and Immunology
  • Autoimmune Diseases
  • Connective Tissue Disorders

Background:

  • Connective tissue disorders (CTDs) encompass conditions like systemic lupus erythematosus (SLE), scleroderma, myositis, and Sjögren's syndrome.
  • These disorders are characterized by immune-mediated dysfunction and autoantibody production.
  • Overlapping clinical and serological features are common among patients with CTDs.

Purpose of the Study:

  • To review recent therapeutic and diagnostic advances in connective tissue disorders.
  • To highlight the critical role of B cells in CTD pathogenesis and treatment.
  • To explore future directions for biological therapies targeting the immune system.

Main Methods:

  • Review of current literature on therapeutic and diagnostic advancements in CTDs.
  • Focus on B-cell targeted therapies, including rituximab.
  • Examination of genetic studies implicating the innate immune system.

Main Results:

  • New therapeutic strategies include refined use of existing treatments and novel biological therapies for SLE.
  • Improved assessment protocols for severe manifestations in scleroderma (interstitial lung disease, pulmonary artery hypertension).
  • Identification of new antibodies for myositis characterization and enhanced patient assessment in Sjögren's syndrome.

Conclusions:

  • B-cell depletion or suppression is a promising therapeutic strategy across various CTDs.
  • Rituximab's success in other conditions drives its investigation in CTDs.
  • Genetic insights into the innate immune system offer potential future therapeutic targets.