Animal Tissues

Animal Tissues

An assemblage of one or more types of specialized cells held together with extracellular material constitute the tissue. A group of cells that are similar in origin, form, structure and work together to perform a specific function is called a simple tissue, while a group of cells different in their structure and function but co-ordinate to perform a specific function is called a compound tissue. The study of cell is known as Cytology and tissues is known as Histology.

Animal tissues can be grouped into four basic types on the basis of their structure and functions.

a. Epithelial tissue.

b. Connective tissue

c. Muscular tissue

d. Nervous tissue

All these tissues originate in the embryonic stages from the three primary germ layers namely ectoderm, mesoderm and endoderm.