Chapter 4 - Elementary Tissues of Human Body
| 0.11 Rewards Points
The term tissue was given by French surgeon, Bichat (1771–1802). Tissue is a group of cells that have similar structure and that function together as a unit. Several tissues are found in an organ which also has its own blood and nervous supplies. An organ system performs related tasks, e.g., the digestive system that includes the gut tube, pancreas and liver. 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 those tissue distinctive characteristics. Tissues are classified according to the size, shape and functions of its’s cells. There are four main types of tissues in the body: epithelial, connetive, muscle, and nervous, each of which has it’s subdivisions.