Presentation is loading. Please wait.

Presentation is loading. Please wait.

Connective Tissues.

Similar presentations


Presentation on theme: "Connective Tissues."— Presentation transcript:

1 Connective Tissues

2 Connective tissues Introduction
Connective tissues provide structural support for other tissues and organs. Connective tissues serve to connect other tissues together. Connective tissues carry blood vessels and mediate the exchange of nutrients and waste products between tissues and the circulatory system. Common characteristics The connective tissue cells do not rest on a basement membrane. Connective tissues have two major components: Cells extracellular material matrix (ground substance) of organic materials. a variety of fibers.

3 Connective tissues The cells of connective tissue
The cells of connective tissue can be divided into three types according to their basic function: Cells responsible for synthesis of the extracellular material. These cells are termed fibroblasts. Cells responsible for the storage of fat. These cells are known as fat cells or adipocytes. Cells responsible for defence. Fibers of connective tissue Connective tissue fibers are synthesized by fibroblasts. They are: Collagen forms strong bundles which provide strength to the connective tissue. Elastin rubber-like branching fibers which form an irregular network. Reticulin branching collagen fibers that form network.

4 Connective tissues Classification of connective tissues
Connective tissues are classified according to the nature of the extracellular matrix as follows: Proper connective tissue The extracellular (intercellular) matrix is viscous fluid. e.g. loose and dense connective tissues Skeletal connective tissue The extracellular matrix is jelly-like or solid. e.g. cartilage and bone Vascular tissue The extracellular matrix is fluid e.g. blood

5 Connective tissues Proper connective tissues
Type and abundance of fibers and cells determine the kind of connective tissue. Loose (Areolar) connective tissue The fibers are loosely arranged leaving small spaces between them. Collagenous fibers, also called white fibers, are arranged in wavy branched bundles, the individual fiber in the bundle does not branch. Elastic fibers, also called yellow fibers, are thin, branched and singly arranged (do not form bundles). Cells of loose connective tissue include fibroblasts (synthesize fibers), defence cells (macrophages, mast cells, plasma cells, blood cells) and storage cells (fat cells, also called adipocytes).

6 Proper connective tissues Loose (Areolar) connective tissue

7 Proper connective tissues Loose (Areolar) connective tissue
Plasma cell

8 Connective tissues Proper connective tissues
Dense irregular connective tissue (fibrous C.T.) The tissue is more fibrous and less cellular than loose C.T. It is formed mainly of collagen fibers. Collagen fibers are arranged irregularly assuming a network appearance. Found in the dermis of skin. Dense irregular connective tissue (fibrous C.T.)

9 Connective tissues Proper connective tissues
Dense regular connective tissue (fibrous C.T.) Collagen fibers are abundant and are arranged in parallel bundles. Found in tendons and ligaments. Dense regular connective tissue (fibrous C.T.)

10 Connective tissues Proper connective tissues Elastic connective tissue
Elastic fibers predominate. Provides elastic properties which enable recovery of tissue shape following stretching. Found in arteries, lungs. Elastic connective tissue

11 Connective tissues Proper connective tissues Mucous connective tissue
It is formed of a network of interconnecting fibroblasts embedded in an abundant jelly-like matrix. It contains few and short fibers of collagenous type. Found in umbilical cord. Mucous connective tissue

12 Connective tissues Proper connective tissues Adipose connective tissue
It is composed of groups of fat cells. Found in the subcutaneous tissue and around some organs. Adipose connective tissue


Download ppt "Connective Tissues."

Similar presentations


Ads by Google