Animal Histology Introduction

A tissue is a group of cells having a common origin, similar structure and performing a common function. Tissues are characteristic of advanced multicellular animals, commonly called as eumetazoans. They are true multicellular animals where the body cells aggregate to form tissues, organs and even organ systems.

The tissues in the body of an animals are classified into four basic types, based on their functional specialisation.

Epithelial tissue which is meant mainly for protection and absorption.

Muscular tissue which is responsible for movement.

Connective tissue which connects and binds other tissues.

Nervous tissue which is capable of controlling and coordinating various functions.