histological classification of animal tissues

Introduction - A cell, a tissue or an organ, which secretes certain useful chemical compounds required for a particular function, is called a Gland. Thus glands, which are seretory in functions, can be of two types, namely (i) Exocrine glands that have ducts or the opening for discharging..

Summary - Endocrine system consists of many endocrine or ductless glands, which secrete hormones into the blood. Hormones are information molecules, which regulate specific physiological processes in the target cell, tissues or organs. Hormones co-ordinate the activities of different orga..

. From an acellular level of organisation to cellular level and then tissue level, organ level and organ system level of organization can be recognised. In addition, one can recognise the gradual appearance of distinct features such as symmetry, body wall and body cavity. There are furthe..

Summary - Movements and locomotion takes place as a result of co-operation between the muscle and skeletal system, hence the study of both is necessary. Skeletal system in humans is formed by bones and cartilages. It helps in protection of delicate visceral organs, mechanical support, movements etc..

Permanent Tissues - Permanent tissues are derived from meristematic tissues. They have lost the power of dividing, having attained their definite form and size. In their earlier stages the cells are more or less similar in structure but slowly they become specialized a..

Plant Tissues - The plant body is made up of different kinds of tissues..

Permanent Tissues - These tissues are derived from meristematic tissues. They have lost the power of dividing, having attained their definite form and size. In their earlier stages the cells are more or less similar in structure but slowly they become specialized and f..

Nature, Occurrence and Function: Tissues and organs in a body must be supported and held in position. This function is performed by connective tissue, which binds organs and tissues together. They are of four typ..

The transport of materials takes place through specialised tissue called the vascular tissue. The vascular tissue is of two types: Xylem Phlo..

Tissues and organs in a body must be supported and held in position. This function is performed by connective tissue, which binds organs and tissues togethe..