Tissue is defined as
An aggregation of structurally and functionally identical cells along with their extracellular material, acting in synergy to perform a specific function
STUDY OF TISSUE
The study of tissues falls under two branches which are as follows;
Histology is the branch of anatomy in which we study the structure and functions of tissues.
Histopathology is a diagnostic branch of pathology in which we study tissues in light of various diseases.