Epithelial Tissue Orientation PDF

Epithelial Tissue Orientation FEU- NRMF Department of Human Structural Biology (Drs. Dennis Bravo, Mariemids Borlaza, Dale Giron) FOUR BASIC TISSUE TYPES EPITHELIAL CONNECTIVE MUSCULAR NERVOUS FOUR BASIC TISSUE TYPES EPITHELIAL CON...

Epithelial Tissue Orientation FEU- NRMF Department of Human Structural Biology (Drs. Dennis Bravo, Mariemids Borlaza, Dale Giron) FOUR BASIC TISSUE TYPES EPITHELIAL CONNECTIVE MUSCULAR NERVOUS FOUR BASIC TISSUE TYPES EPITHELIAL CONNECTIVE MUSCULAR NERVOUS  Cell surfaces: basal, apical and lateral Epithelial Tissue structure: shapes of tissue as the cell and presence of layers to: Specialized epithelial tissue Basal surface: Basement membrane Basement Membrane: Kidney-Glomerulus Apical surfaces: - nearest to the lumen or free space - Cilia, sterocilia, microvilli  Cilia CILIA. Tracheal Mucosa The tracheal mucosa is lined by a pseudostratified ciliated epithelium characterized by columnar cells that appear stratified because their nuclei are located on different levels, even though the cells are anchored on the same basement membrane. Cilia are visible on the apical membranes of some of these cells. The epithelium also contains goblet cells, which secrete mucous.  Stereocilia Pseudostratified Columnar Epithelium STEREOCILIA. Epididymis Mucosa The stereocilia of the epididymis are long cytoplasmic projections that have an actin filament backbone. The stereocilia in the epididymis are non-motile. These membrane extensions increase the surface area of the cell, allowing for greater absorption and secretion.  Simple Columnar Epithelium MICROVILLI. Doudenal Mucosa The doudenal mucosa is highly folded with smaller folds called villi, which are finger like mucosal projections, about 1mm long (not shown on the picture). The lining columnar epithelial cells have fine projections on their apical surfaces called microvilli which functions to increase absorptive surface area. Lateral surfaces Located between adjacent cells Forms as a seal between adjacent cells Example: simple columnar epithelium of the gut Forms a strong attachments between cells Channels for Example: stratified communication epithelium of the skin between cells Example: cardiac muscle tissue  Cell surfaces: basal, apical and lateral Epithelial Tissue structure: shapes of tissue as the cell and presence of layers to: Specialized epithelial tissue  EPITHELIAL TISSUE SUBTYPE SPECIFIC SUBTYPE Simple Simple squamous, Simple cuboidal, Simple columnar Stratified Stratified squamous, Stratified columnar, Stratified cuboidal Pseudostratified Pseudostratified squamous, Pseudostratified columnar Transitional Transitional Glandular  KIDNEYS Parietal Layer of the Bowman’s capsule FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE SIMPLE SPECIFIC SUBTYPE SIMPLE SQUAMOUS LINING EPITHELIUM simple squamous epithelium  KIDNEYS PROXIMAL Convoluted Tubule FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE SIMPLE SPECIFIC SUBTYPE SIMPLE CUBOIDAL LINING EPITHELIUM Simple cuboidal epithelium WITH BRUSH BORDERS  KIDNEYS DISTAL Convoluted Tubule FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE SIMPLE SPECIFIC SUBTYPE SIMPLE CUBOIDAL LINING EPITHELIUM Simple cuboidal epithelium WITH FEW OR SCANTY BRUSH BORDERS  THYROID FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE SIMPLE SPECIFIC SUBTYPE SIMPLE CUBOIDAL LINING EPITHELIUM Simple cuboidal epithelium  ILEUM FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE: SIMPLE SPECIFIC SUBTYPE: SIMPLE COLUMNAR LINING EPITHELIUM Simple columnar epithelium WITH GOBLET CELLS ILEUM  Simple Columnar Epithelium SIMPLE COLUMNAR EPITHELIUM. Gallbladder The Simple Columnar Epithelial lining of the gall bladder consists of a single cell type, specialized for water absorption to concentrate bile. This epithelium is composed of single layer of tall columnar cells. SKIN (EPIDERMIS) FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE: STRATIFIED SPECIFIC SUBTYPE: STRATIFIED SQUAMOUS LINING EPITHELIUM Stratified squamous keratinized (dry) epithelium VAGINA FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE: STRATIFIED SPECIFIC SUBTYPE: STRATIFIED SQUAMOUS LINING EPITHELIUM Stratified squamous nonkeratinized (moist) epithelium OVARY (growing follicle) FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE: STRATIFIED SPECIFIC SUBTYPE: STRATIFIED CUBOIDAL LINING EPITHELIUM Stratified cuboidal epithelium  TRACHEA FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE PSEUDOSTRATIFIED SPECIFIC SUBTYPE PSEUDOSTRATIFIED COLUMNAR LINING EPITHELIUM Pseudostratified Columnar Ciliated Epithelium with Goblet Cells TRACHEA  FUNDAMENTAL TYPE: URINARY EPITHELIAL SUBTYPE BLADDER TRANSITIONAL or UROEPITHELIUM TRANSITIONAL EPITHELIUM. Urinary Bladder Mucosa The urinary bladder is lined by Transitional Epithelium, underneath which are thick layers of smooth muscle interwoven in various directions. This image shows a relaxed bladder where the epithelial cells appear cuboidal. In a distended bladder the epithelial cells are stretched and become more squamous. URINARY BLADDER  LIVER FUNDAMENTAL TYPE: EPITHELIAL SUBTYPE GLANDULAR  Cell surfaces: basal, apical and lateral Epithelial Tissue structure: shapes of tissue as the cell and presence of layers to: Specialized epithelial tissue LAB EXERCISES What is the lining epithelium of the organ in focus? a. Pseudostratified columnar ciliated with goblet cells b. Simple squamous c. Stratified columnar d. Simple cuboidal What is the specific subtype? a. Stratified squamous b. Stratified cuboidal c. Stratified columnar What is the lining epithelium? a. Stratified squamous nonkeratinized b. Stratified squamous keratinized c. Stratified columnar What is the structure pointed by the arrow? a. cilia b. microvilli c. stereocilia Thank you for listening. Stay safe and sane always.J