Tissue (Introduction)

A tissue is a group of cells that usually have a common origin and function together to carry out specialized activities.

Tissues may be hard, semisolid, or even liquid in their consistency, a range exemplified by bone, fat, and blood.

Histology (histo- tissue; -logy- study of) is the science that deals with the study of tissues.

Animal Tissues

Epithetial tissue

(Protection by covering, secretion, Absoption)

Connective Tissue

(Binding, support, transport)

Muscular tissue

(Movement and Locomotion)

Nervous Tissue

(Control and

co-ordination)

2. Epithelial Tissue

Structural characteristics : The cells forming epithelial tissue –

(i) Are closely packed with no intercellular space in between.

(ii) Arise from a non-cellular basement membrane.

(iii) Not supplied with blood vessels

Functions

Line the surfaces, help in absorption, secrete, also bear protoplasmic projections such as the Cilia.