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

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