Major content provider: U.S. National Cancer
Tissue is a group of cells that have similar structure and that function together as a unit. A nonliving material, called the intercellular matrix, fills the spaces between the cells. This may be abundant in some tissues and minimal in others. The intercellular matrix may contain special substances such as salts and fibers that are unique to a specific tissue and gives that tissue distinctive characteristics. There are four main tissue types in the body: epithelial, connective, muscle, and nervous. Each is designed for specific functions. Use the hyperlinks below to branch into a tissue type and learn more about the topic.
- Epithelial Tissue
- Connective Tissue
- Muscle Tissue
- Nervous Tissue