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Chapter 4.2: Tissues

Chapter 4.2: Tissues. Cell Shapes. Squamous Thin and flat Nucleus in the thickest part of the cell. Figure 4.4. Cell Shapes cont…. Cuboidal Square. Figure 4.4. Cell Shapes cont…. Columnar Rectangular. Figure 4.4. Simple Squamous Epithelium.

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Chapter 4.2: Tissues

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  1. Chapter 4.2: Tissues

  2. Cell Shapes • Squamous • Thin and flat • Nucleus in the thickest part of the cell

  3. Figure 4.4

  4. Cell Shapes cont… • Cuboidal • Square

  5. Figure 4.4

  6. Cell Shapes cont… • Columnar • Rectangular

  7. Figure 4.4

  8. Simple Squamous Epithelium • Protected regions where absorption takes place • Ex: Kidneys, Lungs, Heart

  9. Figure 4.4a

  10. Simple Cuboidal Epithelium • Limited protection where absorption/secretion happens • Ex: Pancreas, Salivary Glands

  11. Figure 4.4b

  12. Simple Columnar Epithelium • Some protection, absorb, secrete • Ex: Stomach, Intestines

  13. Figure 4.4c

  14. Pseudostratified Epithelium • All cells touch basement membrane • Nuclei at different places • Looks layered • Have cilia • Ex: Nasal cavity, Trachea, Bronchi

  15. Figure 4.5a

  16. Transitional Epithelium • Able to stretch • Contain more than one shape of cells • Ex: Bladder

  17. Figure 4.5b

  18. Stratified Squamous Epithelium • Where severe stess happens • Surface of skin

  19. Figure 4.5c

  20. Glandular Epithelium • Mode of Secretion • Merocrine Glands • Produces mucus • Lubricates, Barrier, Perspiration

  21. Figure 4.6a

  22. Modes of secretion cont… • Apocrine Glands • Milk production • Thicker, milkier sweat

  23. Figure 4.6b

  24. Modes of Secretion cont… • Holocrine Glands • Skin oils • Waxy coating on hair

  25. Figure 4.6c

  26. Types of Secretions • Serous—water containing enzymes • Mucous—thick, slippery mucus • Mixed—produces both

  27. Figure 4.6aa

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