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Introduction to Connective Tissues

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,...

Connective Tissue Cell Types

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...

Embryonic Connective Tissues

Embryonic Connective Tissues

During early development, the embryo forms two types of connective tissues— the mesenchyme and mucoid connective tissue.
The mesenchyme is the first connective tissue that emerges in the developing embryo. It consists of loosely arranged multipotent mesenchymal cells and reticular fibers in the extracellular matrix. This loose arrangement allows easy migration of cells, which is essential for germ layer positioning, patterning, and organ morphogenesis during embryonic development. Mesenchyme is...

Loose Connective Tissue

Loose Connective Tissue

Loose connective tissue is found between many organs. Its main function is to absorb shock and bind tissues together. It also allows water, salts, and various nutrients to diffuse into cells that are embedded in it or present in adjacent tissues.
Adipose Tissue
Adipose tissue consists primarily of fat storage cells called adipocytes and little extracellular matrix. A large number of capillaries present within adipose tissue allow rapid mobilization of lipid molecules. White adipose tissue is...

Classification of Connective Tissues

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.

Dense Connective Tissue

Dense Connective Tissue

Dense connective tissue contains more collagen fibers than loose connective tissue. As a consequence, it displays greater resistance to stretching. There are two major categories of dense connective tissue— regular and irregular.
Dense Regular Connective Tissue
In dense regular connective tissue, fibers are arranged parallel to each other, enhancing its tensile strength and resistance to stretching in the direction of the fiber orientations. Ligaments and tendons are made of dense regular...

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[Diagnosis and treatment of ANCA-associated vasculitis : S3 guideline of the German Society for Rheumatology and Clinical Immunology e. V. (DGRh) and German Society for Internal Medicine e. V. (DGIM), German Society for Nephrology e. V. (DGfN), German Society for ENT Medicine and Head and Neck Surgery e. V. (DGHNO-KHC), German Ophthalmological Society e. V. (DOG), German Society for Neurology e. V. (DGN), German Society for Pneumology and Respiratory Medicine e. V. (DGP), German Society for Pathology e. V. (DGP), German Radiological Society, Society for Medical Radiology e. V. (DRG), Federal Association of German Pathologists, Federal Kidney Association e. V., German Rheumatism League Federal Association e. V.]

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Updated: Jul 19, 2026

Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface

Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface

Published on: May 21, 2015

Connective tissue diseases and pregnancy.

P Saar¹, W Hermann, U Müller-Ladner

¹Department of Rheumatology and Clinical Immunology, University of Giessen and Marburg, Kerckhoff Clinic Bad Nauheim, Benekestrasse 2-8, D-61231 Bad Nauheim, Germany.

Rheumatology (Oxford, England)

|September 22, 2006

Summary

Pregnancies in women with connective tissue diseases (CTD) are high-risk and require specialized care. An interdisciplinary approach is crucial for managing maternal and neonatal health in these high-risk pregnancies.

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Isolation of Leukocytes from the Human Maternal-fetal Interface

Isolation of Leukocytes from the Human Maternal-fetal Interface

Published on: May 21, 2015

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Last Updated: Jul 19, 2026

Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface

Isolation of Leukocytes from the Murine Tissues at the Maternal-Fetal Interface

Published on: May 21, 2015

Isolation of Leukocytes from the Human Maternal-fetal Interface

Isolation of Leukocytes from the Human Maternal-fetal Interface

Published on: May 21, 2015

Area of Science:

Rheumatology
Obstetrics
Neonatology

Background:

Connective tissue diseases (CTD) frequently affect women of childbearing age.
Pregnancies in women with CTD are considered high-risk, necessitating intensive monitoring and management.

Purpose of the Study:

To outline the key considerations for managing pregnancies in women with CTD.
To emphasize the need for an interdisciplinary approach involving rheumatology, obstetrics, and neonatology.

Main Methods:

Review of diagnostic tools and laboratory parameters for pregnant CTD patients.
Discussion of hemostaseological issues, including antiphospholipid antibodies.
Overview of neonatal lupus erythematosus and congenital heart block risks.
Consideration of drug therapy during pregnancy and postpartum.

Main Results:

Pregnant CTD patients face risks including hemostaseological problems and potential neonatal complications.
Specialized diagnostic and laboratory assessments are vital throughout pregnancy and postpartum.

Conclusions:

An interdisciplinary setting is essential for optimal care of pregnant women with CTD.
Comprehensive management strategies are required to address the complexities of CTD in pregnancy.