Anatomy & Physiology (43) Classification of Connective Tissue | Types of Connective Tissue | Tissue
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Connective tissue, as the name implies, is a term given to several different tissues of the body that serve to connect, support and help bind other tissues in the body. Connective tissue can further be broken down into three categories: loose connective tissue, dense connective tissue, and specialized connective tissue. Loose connective tissue works to hold organs in place and is made up of extracellular matrix and collagenous, elastic and reticular fibers. Dense connective tissue is what makes up tendons and ligaments and consist of a higher density of collagen fibers. Examples of specialized connective tissues are adipose tissue, cartilage, bone, blood, and lymph.
(01) Binding, support and packaging:
Other tissues (epithelia, muscles, nerves) are supported, surrounded and held in place by connective tissues. Connective tissue fibers form capsules and membranes which surround organs, and form ligaments and tendons which bind bones to each other or to muscles. They also form the 3-dimensional fibrous mesh which supports cells inside large soft organs such as the liver and spleen. Bone and cartilage support body organs. The delicate and fragile areolar connective tissue forms a soft packing around organs.
(02) Protection, defense and repair:
Some connective tissues have great regenerative ability and are important in repair following injury. Scar tissue is formed of connective tissue which fills in spaces where the original tissue does not regenerate. Several cellular and molecular components of connective tissue function in defense against invading bacteria or chemical substances. Inflammation is a defensive response of connective tissue at the site of infection or injury. The skull is a bony chamber which protects the soft brain tissue.
(03) Insulation:
Fat cells or adipose tissue, is a connective tissue which not only cushions body organs but also insulates them and provides reserve energy fuel.
(04) Transportation:
Blood is a connective tissue and it carries and delivers oxygen and nutrient to tissues.
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