Tissues Definition Tissues Definition Collections of cells Tissues

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

• 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)

• Primary Tissue Types

• Primary Tissue Types (Derived from the Embryonic Tissue)

• 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

• Specialization of Epithelial Cells – Polarity

• Specialization of Epithelial Cells – Polarity – Cilia *

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

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

• Characteristics of Epithelial Tissue

• 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

• 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

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)

• 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

• 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 – --------------------