Understanding Basic Histology and Tissue Types

Slide Note
Embed
Share

Explore histology, tissues, and types of tissues including epithelial, connective, muscle, and nerve tissues. Learn about tissue characteristics, differences, and functions, as well as details on specific tissue types like cardiac muscle, bone tissue, skeletal muscle, and smooth muscle. Delve into epithelial tissues, glandular epithelia, and the layers of closely adhering cells in epithelial tissue.


Uploaded on Oct 09, 2024 | 0 Views


Download Presentation

Please find below an Image/Link to download the presentation.

The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.

E N D

Presentation Transcript


  1. Histology

  2. Tissues Groups of cells similar in structure and function - the structure plays a role into the function The structure and function complement each other

  3. Types of Tissues Epithelial tissue Connective tissue Muscle tissue Nerve tissue Atoms to Molecules to Cells

  4. Tissue Characteristics Differences between the tissue classes Types and functions of cells Characteristics of matrix (extracellular matrix) Fibrous proteins Ground substance thick or thin Clear gels (ECF, tissue fluid, interstitial fluid, tissue gel) Rubbery or stony in cartilage or bone

  5. Tisssue Characteristics Space occupied by cells versus matrix Connective tissue cells are widely separated Little matrix between epithelial and muscle cells

  6. Cardiac Muscle - one nucleus in cardiac muscle

  7. Bone tissue

  8. Skeletal muscle - alternating dark and white patterns in skeletal muscles

  9. Smooth Muscle - they do not have alternating dark and light muscles

  10. Smooth Muscle

  11. Epithelial Tissue Two main types - Covering and lining epithelia - on external and internal surfaces Glandular epithelia Secretory tissue in glands

  12. Glandular Epithelia ge glandular epithelia lp lamina propria

  13. Epithelial Tissue Layers of closely adhering cells Flat sheet with upper surfaces exposed to the environment or an internal body cavity No blood vessels Underlying connective tissue supplies oxygen Rests on basement membrane Thin layer of collagen and adhesive proteins Anchors epithelium to connective tissue

  14. Basement Membrane

  15. Basement Membrane Not only an anchoring gel but also provides nutrients to the epithelium

  16. Squamous covering Cuboidal and Columnar absorption The nucleus of columnar cells are found on the lower third of a cell

  17. Squamous

  18. Simple Squamous 1 layer of flat cells

  19. Serous Membranes watery membrane

  20. Small intestine has epithelial tissue lining the inside and outside Outside of small intestine serous membrane Outer layer of the heart serous membrane What is the common feature of the small intestine and the heart?

  21. Heart is constantly pumping the serous membrane also reduces wear and tear Small intestine produces watery secretions - the water in the serous membrane reduces friction and therefore reduces wear and tear

  22. Simple Squamous Alveoli

  23. Simple squamous alveoli

  24. Surrounding the alveoli air sacs are capillaries Alveoli capillaries for oxygenation and removal of carbon dioxide Allows for rapid exchange if you have simple squamous epithelium

  25. Simple Cuboidal Picture

  26. Simple Cuboidal Epithelium Found in areas of secretion and excretion Kidneys

  27. Renal Tubules

  28. Renal Tubules

  29. Simple Cuboidal Epithelium One layer of cube-shaped cells

  30. Simple Columnar Epitheliumm

  31. Simple Columnar Epithelium Tallest of the epithelial cells Found in small intestines almost all of absorption of nutrients is found here

  32. Small Intestine: Villi

  33. Villi finger-like extensions

  34. Lumen hollow opening within an organ

  35. Crypts

  36. Villi in the apical surface are microvilli

  37. Microvilli they form the brush border Small extensions of the cell

  38. The taller the cells the higher the chance of absorption The microvilli increases the absorptive area by increasing the height of cells Whenever you see cells with microvilli you should think that these cells are used to absorb everything

  39. Villi and Goblet Cells

  40. Goblet cells produce mucus

  41. Pseudostratified Columnar Epithelium Stratified multi-layered - every single cell originates on one exact membrane but they are of different heights that is why they look stratified Respiratory mucosa

  42. Ciliated Epithelium respiratory mucosa - lines the conducting airway of the lungs

  43. Respiratory Mucosa Goblet Cells Secrete mucus and line the conducting airways Very sticky secretion Release a protein called Mucin Mucin combines with water and it becomes mucus We want to clear the air before it reaches the our air sacs so that it would not damage our lungs

  44. Fallopian tubes in females

  45. Which one moves? Cilia or microvilli?

  46. Stratified Squamous Epithelium 2 major types a. keratinized b. non-keratinized

  47. Stratified Squamous Non Keratinized wet areas of the body

Related


More Related Content