1. Tissue differentiation
Human Tissues
Tissue differentiation

2. Tissue Types
Muscle
Epithelial
Connective
Nervous

3. Muscle Tissue 3 types of muscle tissue Cardiac –heart
Skeletal – attached to bones
Smooth – internal organs and blood vessels

4. Cardiac Muscle

5. Skeletal Muscle

6. Smooth Muscle

7. Epithelial Tissue 3 types of epithelial tissue Squamous Cuboidal
Columnar
Descriptive layers
Simple – one layer
Stratified – more than one layer

8. Epithelial Cell Shapes

9. Simple Squamous Epithelia

10. Simple Cuboidal Epithelia

11. Simple Columnar Epithelia

12. Stratified Squamous Epithelia

13. Pseudostratified ciliated columnar epithelia

14. Connective Tissue 6 Types Loose connective tissue
Dense connective tissue
Adipose
Blood
Cartilage
Bone

15. Loose Connective Tissue

16. Areolar C.T.

17. Dense Connective Tissue

18. Fibrous C.T.

19. Adipose Tissue

21. Blood

22. Blood smear

23. Cartilage

24. Cartilage types
Hyaline
Elastic
Fibrocartilage

25. Hyaline

26. Elastic

27. Fibrous

29. Bone

30. Nerve Tissue

32. Hemophilia

33. Tissue Repair Occurs in two different ways:
1. Regeneration – replacement of destroyed tissue by the same kind of cells.
2. Fibrosis – repair by dense (fibrous) connective tissue…forms scar tissue.

34. Tissue Repair What determines which type of repair occurs?
1. Type of tissue damaged
2. Severity of injury

35. Tissue Repair Repair Success?
Clean cuts – more successful than ragged tears.

37. Imbalances - Keloids

38. 3 Events in Tissue Repair
1. Capillaries become very permeable
Introduce clotting proteins
A clot walls off the injured area
Holds the edges of the wound together
Walls off injured area (preventing bacteria/infection)
Where clot exposed to air – dries/forms scar

39. 3 Events in Tissue Repair
2. Formation of granulation tissue
Delicate pink tissue
Growth of new capillaries – bleed frequently
Contains phagocytes (cleanup) of blood clot
Rebuild collagen fibers

40. 3 Events in Tissue Repair
3. Regeneration of surface epithelium
Scab detaches
Scar remains visible depending on severity

41. Regeneration of Tissues
Tissues that regenerate easily
Epithelial tissue (skin and mucous membranes)
Fibrous connective tissues and bone
Tissues that regenerate poorly
Skeletal muscle
Tissues that are replaced largely with scar tissue
Cardiac muscle
Nervous tissue within the brain and spinal cord

42. Developmental Aspects of Tissue
Epithelial tissue arises from all three primary germ layers
Muscle and connective tissue arise from the mesoderm
Nervous tissue arises from the ectoderm
With old age, there is a decrease in mass and viability in most tissues