Chapter 4: Tissues Types, Functions, and Recognition

Epithelial Tissue

Protection, Absorption, Filtration, Secretion, Excretion, Sensory reception

Characteristics of Epithelial Tissue

Highly cellular, Little extracellular matrix, Avascular, Regenerates quickly, Supported by connective tissue

Memorization acronym for Epithelial Functions

PAFSES

Squamous

Flat, thin cells

Cuboidal

Cube-shaped cells

Columnar

Tall cells

Simple Epithelial

One layer

Stratified Epithelial

Multiple layers

Pseudostratified Epithelial

Looks layered but is actually one layer

Transitional Epithelial

Stretches

Functions of Connective Tissue

Support, Protection, Binding, Storage, Transport

Areolar Tissue

Under epithelium, wraps organs

Adipose Tissue

Energy storage, Cushioning, Insulation

Reticular Tissue

Framework of organs

Dense Connective Tissue

Contains large amounts of collagen fibers

Hyaline Cartilage

Most common type of cartilage

Elastic Cartilage

Found in the external ear

Fibrocartilage

Strongest cartilage, found in intervertebral discs

Osteocytes

Mature bone cells

Lacunae

Spaces containing osteocytes

Matrix of Bone Tissue

Hard and calcified

Components of Blood

Plasma, RBCs, WBCs, Platelets

Tight Junctions

Prevent leakage

Gap Junctions

Cell communication

Desmosomes

Strong anchors, likened to duct tape