Tissues

Definition:

Levels of Organization:Parts:

Types:

A group of similar cells that perform a specialized function.

1. Epithelial – form protective coverings and function in secretion and absorption.

2. Connective – support soft body parts and bind structures together.

3. Muscle – produce body movements

4. Nervous – conduct impulses that help control and coordinate body activities.

1 - cells

2 – Extracellular matrix – nonliving portion that transmits signals from outside cells into cells

Introduction to Tissues

• A tissue is a group of similar cells That usually have common origin & function.

• The structure & properties of tissue depends on the nature of extracellular material.

• Tissues may be hard, semisolid, or even liquid in their consistency,

• Examples: bone, fat and blood

4 Basic Tissue Types

• Epithelial Tissue: Covers body surfaces & lines hollow organs, body cavities, and ducts. Forms glands

• Connective Tissue: Protect & supports the body & its organs. Binds organs together, store energy & help provide immunity to disease- causing organisms

• Muscular Tissue: Generates physical force

• Nervous Tissue: Detect changes in a variety of conditions inside & outside the body & respond by generating nerve impulses