BIOL 212 - Histology

What are the 4 Tissue types?

• Epithelial

• Connective

• Muscular

• Nervous

Tissue Level Organization

2 or more cells that share a similar origin and common structural function features

Epithelial Tissue

Sheets of interconnected cells that cover body surfaces, line cavities, ducts, tubes, and vessels

Also make up the functional portion of glands

Cellularity

The intercellular junctions that join cell membranes of nearby cells

Polarity

when a cell has different sides that allow it to have various functions

Apical Border

connects to the superficial edge of the cell

Basal Border

Deep region of the cell

Connects to the basement membrane

Basement Membrane

Acts like glue to attach the epithelial cells to the deeper surrounding tissue

Is Epithelial Tissue Vascular or Avascular?

Avascular (lacks blood vessels)

Epithelial Tissue is in close contact with what tissue?

Connective tissue because it is vascular

Simple Layer

one cell layer deep