1. Histology

2. Tissue
Despite its complexity, the human body is composed of only four basic types of tissue:
Epithelial
Connective
Muscular and
Nervous

3. Four Basic types of tissues
Cells
Extracellular Matrix
Main function
Nervous
elongated processes
None
Transmission of nervous impulses
Epithelial
Aggregated polyhedral cells
Very small amount
Lining of surface or body cavities,glandular secretion
Muscle
Elongated contractile cells
Moderate amount
Movement
Connective Tissue
Several types of fixed & wandering cells
Abundant amount
Support and protection

4. Organs and organ systems
These tissues exist not as isolated units but as rather in association with one another and in variable proportions, forming different organs and systems of the body.