Tissues Definition:

Tissues Definition: Collections of cells

Tissues Definition: Collections of cells and extracellular materials

Tissues Definition: Collections of cells and extracellular materials that perform specific functions

Tissues Intercellular Connections

Tissues Intercellular Connections – Gap junctions

Tissues Intercellular Connections – Gap junctions – Tight junctions

Tissues Intercellular Connections – Gap junctions – Tight junctions – Intermediate junctions and desmosomes

Early Embryonic Tissue: the Primary Germ Layers

– Ectoderm

Early Embryonic Tissue: the Primary Germ Layers – Ectoderm – Mesoderm

Early Embryonic Tissue: the Primary Germ Layers – Ectoderm – Mesoderm – Endoderm –(click here for embryonic/fetal development animation)(click here for embryonic/fetal development animation)

Primary Tissue Types

Primary Tissue Types (Derived from the Embryonic Tissue)

– Epithelial Tissue

Primary Tissue Types (Derived from the Embryonic Tissue) – Epithelial Tissue – Connective Tissue

Primary Tissue Types (Derived from the Embryonic Tissue) – Epithelial Tissue – Connective Tissue – Muscle Tissue

Primary Tissue Types (Derived from the Embryonic Tissue) – Epithelial Tissue – Connective Tissue – Muscle Tissue – Neural Tissue

Specialization of Epithelial Cells

– Polarity

Specialization of Epithelial Cells – Polarity – Cilia *Cilia *

Specialization of Epithelial Cells – Polarity – Cilia – Stereocilia *Stereocilia *

Specialization of Epithelial Cells – Polarity – Cilia – Stereocilia – Microvilli

Characteristics of Epithelial Tissue

– Layers of cells that form a barrier

Characteristics of Epithelial Tissue – Layers of cells that form a barrier – Free surface

Characteristics of Epithelial Tissue – Layers of cells that form a barrier – Free surface – Basement membrane

Characteristics of Epithelial Tissue – Layers of cells that form a barrier – Free surface – Basement membrane – Closely packed cells

Characteristics of Epithelial Tissue – Layers of cells that form a barrier – Free surface – Basement membrane – Closely packed cells – Avascular

Characteristics of Epithelial Tissue – Layers of cells that form a barrier – Free surface – Basement membrane – Closely packed cells – Avascular – Regeneration

Functions of Epithelial Tissue

– Physical protection

Functions of Epithelial Tissue – Physical protection – Permeability Control

Functions of Epithelial Tissue – Physical protection – Permeability Control – Sensations

Functions of Epithelial Tissue – Physical protection – Permeability Control – Sensations – Secretions

Classification of Epithelial Tissue

Functional Classification

Classification of Epithelial Tissue Functional Classification – Glandular epithelium

Classification of Epithelial Tissue Functional Classification – Glandular epithelium – Lining and covering epithelium

Anatomical Classification

Anatomical Classification (based on shape of cells

Anatomical Classification (based on shape of cells and number of cell layers)

– Simple Squamous

Anatomical Classification (based on shape of cells and number of cell layers) – Simple Squamous – Simple Cuboidal

Anatomical Classification (based on shape of cells and number of cell layers) – Simple Squamous – Simple Cuboidal – Simple Columnar

Anatomical Classification (based on shape of cells and number of cell layers) – Simple Squamous – Simple Cuboidal – Simple Columnar – Stratified Squamous

Anatomical Classification (based on shape of cells and number of cell layers) – Simple Squamous – Simple Cuboidal – Simple Columnar – Stratified Squamous – Transitional

Anatomical Classification (based on shape of cells and number of cell layers) – Simple Squamous – Simple Cuboidal – Simple Columnar – Stratified Squamous – Transitional – Pseudostratified Columnar

Anatomical Classification (based on shape of cells and number of cell layers) – Simple Squamous – Simple Cuboidal – Simple Columnar – Stratified Squamous – Transitional – Pseudostratified Columnar

Maintenance of Epithelial Structural Integrity

– Intercellular connections

Maintenance of Epithelial Structural Integrity – Intercellular connections Desmosomes and intermediate junctions

Maintenance of Epithelial Structural Integrity – Intercellular connections Desmosomes and intermediate junctions – Basement membrane

Maintenance of Epithelial Structural Integrity – Intercellular connections Desmosomes and intermediate junctions – Basement membrane – Regeneration ability –