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Tissue

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  • 1. Jenna Hellack Jan 2001
  • 2. Categories of Tissues <ul><li>Epithelium </li></ul><ul><li>Connective </li></ul><ul><li>Muscle </li></ul><ul><li>Nervous </li></ul>Jenna Hellack Jan 2001
  • 3. Epithelium <ul><li>Lines, covers, and protects other tissues and organs. </li></ul><ul><li>Characterized by: </li></ul><ul><ul><li>Cells tightly junked together </li></ul></ul><ul><ul><li>The presence of a cell secretion called the basement membrane . </li></ul></ul><ul><li>Named by: </li></ul><ul><ul><li>Cell shape </li></ul></ul><ul><ul><li>Other characteristics of the cells. </li></ul></ul><ul><li>Squamous , Cuboidal , and Columnar </li></ul>Jenna Hellack Jan 2001
  • 4. Squamous Epithelium <ul><li>Cells very thin, much wider than they are thick. </li></ul><ul><ul><li>Simple Squamous Epithelium </li></ul></ul><ul><ul><ul><li>Air sacs of respiratory </li></ul></ul></ul><ul><ul><ul><li>Lining of blood vessels, heart and lymphatic tubes </li></ul></ul></ul><ul><ul><li>Stratified Squamous Epithelium </li></ul></ul><ul><ul><ul><li>Skin </li></ul></ul></ul><ul><ul><ul><li>Vagina </li></ul></ul></ul><ul><ul><ul><li>Esophagus </li></ul></ul></ul><ul><ul><ul><li>Mouth </li></ul></ul></ul>Jenna Hellack Jan 2001
  • 5. Examples of Simple Squamous Epithelium Jenna Hellack Jan 2001
  • 6. Stratified Squamous Epithelium Jenna Hellack Jan 2001
  • 7. Cuboidal Epithelium <ul><li>Cells cube shaped- secretion and absorption. </li></ul><ul><ul><li>Kidney tubules </li></ul></ul><ul><ul><li>Duct and small glands </li></ul></ul><ul><ul><li>Surface of ovary </li></ul></ul>Jenna Hellack Jan 2001
  • 8. Columnar Epithelium <ul><li>Elongated cells, much longer than they are wide. </li></ul><ul><ul><li>Simple Columnar Epithelium </li></ul></ul><ul><ul><ul><li>A single layer of cells that line the digestive tract, gallbladder and excretory ducts of some glands. Has microvilli at surface for absorption. </li></ul></ul></ul><ul><ul><li>Pseudostratified ciliated columnar epithelium </li></ul></ul><ul><ul><ul><li>Lines the bronchi, trachea, uterine tubes and some of the uterus. Propels mucus or reproductive cells by ciliary action. </li></ul></ul></ul>Jenna Hellack Jan 2001
  • 9. Simple Columnar epithelium
  • 10. Pseudostratified Ciliated Columnar Epithelium Jenna Hellack Jan 2001
  • 11. Connective Tissue <ul><li>Characterized by the cells widely separated from each other in a matrix that is produced by the cells. </li></ul><ul><li>Tissue protects and supports. </li></ul><ul><li>Cell Matrix composed of two regions </li></ul><ul><ul><li>Ground </li></ul></ul><ul><ul><ul><li>Liquid (sol), Gel, Gum or solid </li></ul></ul></ul><ul><ul><li>Fibers </li></ul></ul><ul><ul><ul><li>Non-elastic (= white or Collagen) </li></ul></ul></ul><ul><ul><ul><li>Elastic (= yellow fibers) </li></ul></ul></ul><ul><li>Types of Connective tissue </li></ul>Jenna Hellack Jan 2001
  • 12. Types of Connective Tissue <ul><li>Loose (Areolar) Connective Tissue </li></ul><ul><li>Dense Connective Tissue </li></ul><ul><li>Adipose </li></ul><ul><li>Cartilage </li></ul><ul><li>Bone </li></ul><ul><li>Blood </li></ul>Jenna Hellack Jan 2001
  • 13. Loose Connective Tissue (Areolar) <ul><li>Gel like ground with both elastic and non-elastic fibers running though the ground in many directions. </li></ul><ul><ul><li>Wraps and cushions organs </li></ul></ul><ul><ul><li>Under the skin </li></ul></ul>Jenna Hellack Jan 2001
  • 14. Dense Regular Connective Tissue <ul><li>Nuclei and fibers arranged in parallel rows. </li></ul><ul><ul><li>Tendons and ligaments </li></ul></ul><ul><ul><li>Fibers mostly non-elastic </li></ul></ul>Jenna Hellack Jan 2001
  • 15. Adipose (Fat) <ul><li>Function as storage cells for adipose (lipids) </li></ul><ul><li>Adipose cells contain a large vacuole which in the live cell contains lipids. </li></ul><ul><li>Cell nucleus and cytoplasm are pushed out to edge of cell membrane. </li></ul>Jenna Hellack Jan 2001
  • 16. Cartilage <ul><li>Ground of matrix is gum like. </li></ul><ul><li>Cells are found in Lacunae within the matrix. </li></ul><ul><li>Fibers may be elastic or non-elastic , or a form of non-elastic called reticular (where the non-elastic fibers of very thin) </li></ul><ul><ul><li>Hyaline Cartilage -example on the ends of bones </li></ul></ul><ul><ul><li>Elastic Cartilage - example ear cartilage </li></ul></ul><ul><ul><li>Non-elastic Cartilage - example nose cartilage. </li></ul></ul>Jenna Hellack Jan 2001
  • 17. Hyaline cartilage Jenna Hellack Jan 2001
  • 18. Elastic Cartilage Jenna Hellack Jan 2001
  • 19. Bone <ul><ul><li>Ground of matrix is Solid (Calcium carbonate). </li></ul></ul><ul><ul><li>Has blood supply and nerves running through the Haversian canal systems. </li></ul></ul>
  • 20. Vascular Tissue (Blood) <ul><li>Liquid matrix = plasma </li></ul><ul><ul><li>90% water </li></ul></ul><ul><ul><li>10%Plasma proteins, electrolytes, hormones, oxygen, glucose etc. </li></ul></ul><ul><li>Formed elements </li></ul><ul><ul><li>Erythrocytes -48billion(female) to 54 billion (male) cell / ml of blood in humans. Mammals are enucleated while rest of the vertebrates they have nuclei </li></ul></ul><ul><ul><li>Leukocytes -about 7.5 million / ml of blood </li></ul></ul><ul><ul><li>Platelets -blood clotting </li></ul></ul>Jenna Hellack Jan 2001
  • 21. Blood
  • 22. Muscle Tissue <ul><li>Tissue with cells having fibers specialized for contraction. </li></ul><ul><ul><li>Skeletal Muscle (Striated, voluntary) </li></ul></ul><ul><ul><ul><li>Parallel elongated cells (fibers) </li></ul></ul></ul><ul><ul><ul><li>multinucleated and each cell is the length of the muscle. </li></ul></ul></ul><ul><ul><ul><li>Light meat, Dark meat—Slow twitch, fast twitch muscle </li></ul></ul></ul><ul><ul><li>Smooth Muscle (Visceral, involuntary) </li></ul></ul><ul><ul><ul><li>Cells are long and tapered. </li></ul></ul></ul><ul><ul><ul><li>Organized into sheets of muscle. </li></ul></ul></ul><ul><ul><li>Cardiac Muscle </li></ul></ul><ul><ul><ul><li>Intercalated disc </li></ul></ul></ul><ul><ul><ul><li>Myogenic </li></ul></ul></ul><ul><ul><ul><li>branched </li></ul></ul></ul>Jenna Hellack Jan 2001
  • 23. Skeletal Muscle Jenna Hellack Jan 2001
  • 24. Smooth Muscle Jenna Hellack Jan 2001
  • 25. Cardiac Muscle Jenna Hellack Jan 2001
  • 26. Nervous Tissue <ul><li>Cells specialized to polarize and depolarize. </li></ul><ul><li>Cell is a neuron </li></ul>Jenna Hellack Jan 2001
  • 27. End of Tissue presentation Jenna Hellack Jan 2001

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