1. CHAPTER 6 CLASSIFICATION OF TISSUES

2. Important Figures and Tables
Page 68: Figure 6a.1
Pages 70-73: Figure 6a.3
Page 74: Figure 6a.4
Pages 75-80: Figure 6a.5
Page 81: Figure 6a.6
Pages 82-83: Figure 6a.7
Histology Atlas, pp 693: Plates 1-5
Histology Atlas on CD

3. Things to know for the quizzes
Know & identify (picture & microscope) different types of tissues.
Know descriptions, locations and functions for ALL tissues as described in the Lab Manual. Pick on location and one function to memorize for each tissue type.

4. Histology: the study of tissues
• Groups of cells similar in structure; perform common or related functions
• Four Basic Types
1.Epithelium
2.Connective
3.Muscle
4.Nervous

5. Epithelial Tissue/Epithelium
Sheet of cells that covers a body surface or lines a body cavity
FUNCTIONS:
1. Protection (eg. skin)
2. Absorption (eg. digestive tract)
3. Filtration
4. Excretion
5. Secretion
• Covering and Lining Epithelium
– outer layer of the skin, cavities
• Glandular Epithelium
–creates the glands of the body
(eg. kidney)

6. Epithelial glands
Exocrine
Endocrine

7. basal lamina+ reticular lamina= basement membrane
Epithelial Tissue/Epithelium
Characteristics:
1.  Cellularity
– composed mostly of closed-packed cells
Specialized contacts
– form continuous sheets (tight junctions, desmosomes)
3.   Polarity
– Apical surface, basal surface
4.   Connective tissue support
basal lamina+ reticular lamina= basement membrane
5.   Avascularity
– nerves, no blood vessels.
– nourished by diffusion
6.   Regeneration  
– high reproductive rate

9. Classification of Epithelia

10. SEE LAB MANUAL FIGURE 6a.3 FOR DESRIPTIONS, LOCATIONS AND FUNCTIONS OF THE FOLLOVING TISSUES

11. Simple squamous epithelium

12. Simple cuboidal epithelium

13. Simple columnar epithelium

14. Pseudostratified epithelium

15. Stratified squamous epithelium

16. Stratified cuboidal epithelium

17. Stratified columnar epithelium

18. Transitional epithelium

19. Connective Tissue • Found everywhere in the body
• Most widely distributed and abundant
• Classes:
1. connective tissue proper
2. cartilage
3. bone
4. Blood
• Purpose:
1. Binding and support
2. Protection
3. Insulation
4. Transportation (blood)

20. Connective Tissue Characteristics: 1. Common Origin
–arise from mesenchyme (embryonic tissue)
2. Degree of vascularity
–wide range of blood supply
• cartilage (avascular);
• bone (well vascularized)
3.  Composed of many cell types
4.  Extracellular matrix
– Mostly non-living
– Separates living tissues of the cells
– Able to bear weight, withstand stresses

21. Structural Elements
1.Ground Substance-space between cells, contains the fibers
-- Interstitial fluid, cell adhesion proteins, proteoglycans. GLUE.
2.Fibers -provide support to connective tissue
-- Collagen -tough, high tensile strength
-- Elastic -stretch and recoil
-- Reticular -surround small blood vessels
3. Cells-immature and mature types
• immature -uses the suffix “-blast”
• mature -uses suffix “-cyte”
Fibroblast: connective tissue proper
Chondroblast: cartilage
Osteoblast: bone
Hematopoietic stem cell: blood

24. SEE LAB MANUAL FIGURE 6a.5 FOR DESRIPTIONS, LOCATIONS AND FUNCTIONS OF THE FOLLOVING TISSUES

25. Mesenchyme

26. Connective tissue proper: Loose connective tissue, Areolar

27. Connective tissue proper: Loose connective tissue, Adipose

28. Connective tissue proper: Loose connective tissue, Reticular

29. Connective tissue proper: Dense connective tissue, Regular

30. Connective tissue proper: Dense connective tissue, Irregular

31. Cartilage: Hyaline

32. Cartilage: Elastic

33. Cartilage: Fibrocartilage

34. Osseous/Bone

35. Blood

36. Other Tissues

37. SEE LAB MANUAL FIGURE 6a.6 FOR DESRIPTIONS, LOCATIONS AND FUNCTIONS OF THE FOLLOVING TISSUES

38. Nervous Tissue

39. Muscle Tissue

40. SEE LAB MANUAL FIGURE 6a.7 FOR DESRIPTIONS, LOCATIONS AND FUNCTIONS OF THE FOLLOVING TISSUES

41. Skeletal Muscle

42. Cardiac Muscle

43. Smooth Muscle