Connective tissue is a type of tissue that connects, supports, and binds other tissues in the body. It is composed of an extracellular matrix and a limited number of cells. Connective tissue can be broken down into two primary categories: connective tissue proper and specialized connective tissue.
Connective Tissue Proper:
- Loose connective tissue: the most widely distributed type of connective tissue, found in the lining of the bodys inner surfaces. It is flexible but not very resistant to mechanical stress.
- Dense connective tissue: contains more collagen fibers than loose connective tissue, making it stronger and more resistant to mechanical stress.
- Elastic connective tissue: contains more elastic fibers than collagen fibers, making it more elastic and able to stretch and recoil.
Specialized Connective Tissue:
- Adipose tissue: stores fat and provides insulation and cushioning.
- Cartilage: provides support and flexibility to certain structures in the body, such as the nose and ears.
- Bone: provides support and protection to the body, as well as producing blood cells and storing minerals.
- Blood: a fluid connective tissue that transports oxygen, nutrients, and waste products throughout the body.
- Lymphatic tissue: a specialized type of connective tissue that helps defend the body against infection.
Connective tissue contributes to numerous body functions, including supporting organs and cells, transporting nutrients and wastes, defending against pathogens, storing fat, and repairing damaged tissues. It is characterized by an abundance of intercellular matrix with relatively few cells. Connective tissue cells are able to reproduce but not as rapidly as epithelial cells.
