Tissues Project No Sound

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Tissues Project No Sound

  1. 1. Tissues <ul><li>Group of cells similar in structure and function </li></ul><ul><li>4 types: </li></ul><ul><li>- epithelial (covering) </li></ul><ul><li>-connective(support) </li></ul><ul><li>-muscle (movement) </li></ul><ul><li>-nerve (control) </li></ul><ul><li>Epithelia connective muscle nerve </li></ul>
  2. 2. Epithelia Tissue <ul><li>Composed entirely of cells </li></ul><ul><li>Sheets of cells held together by tight junctions and desemomes </li></ul><ul><li>Form boundaries between environments </li></ul><ul><li>Regenerative-rapidly replace lost cells </li></ul><ul><li>Avascular but intervated-contains no blood vessels but supplied by nerve fibers </li></ul><ul><li>6 functions: </li></ul><ul><li>- protection, absorption, filtration, excretion, secretion, sensory reception </li></ul><ul><li>classifications: </li></ul><ul><li>-#of layers-simple or squamos </li></ul><ul><li>-shape- squamos, cuboidal, columnar </li></ul><ul><li>Simple stratified tissues </li></ul>Like epithelia tissue, a brick wall forms a boundary between two different environments
  3. 3. Epithelia Simple <ul><li>Main jobs: </li></ul><ul><li>-secretion, absorption, filtration </li></ul><ul><li>Single layer </li></ul><ul><li>Very thin=little protection </li></ul><ul><li>3 types: </li></ul><ul><li>-simple squamos, simple cuboidal, simple columnar </li></ul><ul><li>Simple squamos simple cuboidal simple columnar epithelia tissues </li></ul>
  4. 4. Simple Squamos Epithelium <ul><li>Single layer of flattened cells w/ discs shaped nuclei (resembles fried egg) </li></ul><ul><li>Functions: </li></ul><ul><li>-diffusion and filtration </li></ul><ul><li>Allows passage of material where protection not needed </li></ul><ul><li>Special types : </li></ul><ul><li>-Endothelium “inner covering” </li></ul><ul><li>*Provide slick, friction reducing lining in vessel and heart </li></ul><ul><li>-Mesothelium “middle covering” </li></ul><ul><li>*found in serous membranes of ventral body cavity </li></ul><ul><li>Simple cuboidal simple columnar epithelia simple epithelia tissue </li></ul>
  5. 5. Simple Cuboidal Epithelium <ul><li>Single layer of cells tall as they are wide </li></ul><ul><li>Look like string of dark beads </li></ul><ul><li>Functions: </li></ul><ul><li>- secretion and absorption </li></ul><ul><li>Forms walls on small duct glands and kidney tubules </li></ul><ul><li>Simple squamos simple columnar epithelia simple epithelia tissues </li></ul>
  6. 6. Simple Coulumnar Epithelium <ul><li>align like soldiers to form single layer of tall, closely packed cells </li></ul><ul><li>Lines digestive tract from stomach through rectum </li></ul><ul><li>Two main functions: </li></ul><ul><li>-absorption and secretion </li></ul><ul><li>Dual functions ideal for digestive tract </li></ul><ul><li>-dense microvilli on apical surface of absorptive cells and goblet cells which separate lubricating mucus </li></ul><ul><li>Cilia on free surface allow substance to move through passageways </li></ul><ul><li>Special type: </li></ul><ul><li>-pseudostratified columnar </li></ul><ul><li>* vary in height </li></ul><ul><li>* nuclei lie at different layers = false impression of several layers </li></ul><ul><li>*same functions as simple columnar and line respitory tract </li></ul><ul><li>Simple squamos simpe cuboidal epithelia simple epithelia tissues </li></ul>Simple columnar Psuedostratified epithelium
  7. 7. Stratified epithelia <ul><li>Contains two or more layers </li></ul><ul><li>Regenerate from below: </li></ul><ul><li>-basal cells divide and push to replace </li></ul><ul><li>More durable than simple epithelia </li></ul><ul><li>Major role is protection </li></ul><ul><li>4 types: </li></ul><ul><li>- stratified squamos </li></ul><ul><li>- stratified cuboidal </li></ul><ul><li>- stratified columnar </li></ul><ul><li>- transitional epithelium </li></ul><ul><li>Stratified cuboidal stratified columnar transitional stratified squamos epithelia tissue </li></ul>
  8. 8. Stratified Squamos Epithelium <ul><li>Most wide spread of 4 types </li></ul><ul><li>Several thick layers=perfect for protection </li></ul><ul><li>Found areas subject to wear and tear </li></ul><ul><li>Depends on diffusion of nutrients </li></ul><ul><li>Forms external part of skin to every body opening connected to skin </li></ul><ul><li>Outer layer of skin keratinized </li></ul><ul><li>-tough protective protien </li></ul><ul><li>Stratified cuboidal stratified columnar transitional epithelia stratified epithelia tissue </li></ul>
  9. 9. Stratified Cuboidal Epithelium <ul><li>Very rare </li></ul><ul><li>Found in large ducts </li></ul><ul><li>Usually has two layers </li></ul><ul><li>Stratified columnar stratified squamos transitional stratified epithelia epithelia tissues </li></ul>
  10. 10. Stratified columnar epithelium <ul><li>Not common </li></ul><ul><li>Found in pharynx, male urethra, and glandular ducts </li></ul><ul><li>Only apical layer is columnar </li></ul><ul><li>Stratified cuboidal stratified squamos transitional stratified epithelia epithelia tissues </li></ul>
  11. 11. Transitional Epithelium <ul><li>Forms lining in urinary organs </li></ul><ul><li>Basal layer cells: </li></ul><ul><li>- cuboidal or columnar </li></ul><ul><li>Apical layer cells: </li></ul><ul><li>- vary depending on degree of distention </li></ul><ul><li>Cells change shape to allow urine to be stored </li></ul><ul><li>Stratified squamos stratified cuboidal stratified columnar stratified epithelium epithelia tissues </li></ul>
  12. 12. Connective Tissue <ul><li>Found everywhere in body </li></ul><ul><li>Most abundent and distributed of primary tissues </li></ul><ul><li>Functions: </li></ul><ul><li>- binding and support, protection, insulation, and transportation </li></ul><ul><li>Characteristics: </li></ul><ul><li>- common orgin, degrees of vascularity, extracellular matrix, </li></ul><ul><li>Main elements: </li></ul><ul><li>-ground substance </li></ul><ul><li>*fills space between cells </li></ul><ul><li>-fibers </li></ul><ul><li>*provide support </li></ul><ul><li>-cells </li></ul><ul><li>*fundamental in connective tissue </li></ul><ul><li>4 types </li></ul><ul><li>- proper, cartilage, bone tissue, and blodd </li></ul><ul><li>proper catilage bone tissue blood tissues </li></ul>Like connective tissue, chain links are used to bind and support
  13. 13. Connective Tissue Proper <ul><li>2 subclasses </li></ul><ul><li>-loose connective tissue </li></ul><ul><li>-dense connective tissue </li></ul><ul><li>Except for bone, cartilage, and blood, all connective tissue belongs in this class </li></ul><ul><li>Loose tissue dense tissue connective tissues </li></ul>
  14. 14. Loose Connective Tissues <ul><li>3 types </li></ul><ul><li>- areolar </li></ul><ul><li>-adipose </li></ul><ul><li>-reticular </li></ul><ul><li>Areolar adipose reticular connective tissues </li></ul>open handcuffs are like loose connective tissue as the bind and hold
  15. 15. Areolar Connective Tissues <ul><li>4 functions: </li></ul><ul><li>- support/binds tissues </li></ul><ul><li>-holds body fluids </li></ul><ul><li>-defends against infection </li></ul><ul><li>-stores nutrients </li></ul><ul><li>Loose arrangment of fibers, thus the name areola , which means “small open space” </li></ul><ul><li>Soaks up excess fluid when body inflamed </li></ul><ul><li>Most widely distributed connective tissue </li></ul><ul><li>Binds body parts together </li></ul><ul><li>Present in all mucus membranes </li></ul><ul><li>Adipose reticular loose connective tissue </li></ul>
  16. 16. Adipose Connective Tissue <ul><li>Similar to areolar tissue in structure and function </li></ul><ul><li>Nutrient storing capacity much greater </li></ul><ul><li>Also known as fat tissues because adipocytes(fat cells) take up 90% of tissue’s mass </li></ul><ul><li>Highly vascularized </li></ul><ul><li>High metabolic activity </li></ul><ul><li>Makes up 18% f human’s body weight </li></ul><ul><li>Functions: </li></ul><ul><li>- shock absorber, insulator, stores energy </li></ul><ul><li>Areolar reticular loose connective tissue </li></ul>

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