1. Prepared by Dr. Haneen Nur
Animal tissues
Prepared by Dr. Haneen Nur

2. Types of animal tissues
Epithelial tissue: protection
Connective tissue: linkage & connection
Nervous tissue: signal transduction
Muscular tissue: contraction

3. A. Epithelial tissue

4. 1. Epithelial tissue
- Avascular
- Basement membrane

6. Squamous epithelium (surface view)

7. Simple Squamous epithelium
-Lining blood vessels (artery, vein, capillary)
-It is called endothelium
-Flattened cells with central oval nuclei
-Allow exchange of gases and nutrients

8. 1. Simple Squamous epithelium
-Lining lung alveoli
-Flattened cells with
central oval nuclei
-Allow Exchange of gases

9. 2. Simple cuboidal epithelium
-Lining kidney tubules and thyroid gland
-Cube-shaped (square) cells with central round nuclei
-Important for secretion and reabsorption

10. 3. Simple columnar epithelium
-Lining small intestine (e.g. duodenum), have villi and microvilli to increase the surface area/ volume
-Columnar cells (rectangular) with basal oval nuclei
-Important for absorption of nutrients
-Contain goblet cells to secrete mucus for lubrication

12. 4. Ciliated Pseudostratified columnar epithelium
-Lining trachea
-Cells with oval nuclei but at different levels
-Contain goblet cells to secrete mucus for lubrication
-Beating of cilia + mucus are important to remove foreign particles (food particles and dusts)

15. B. connective tissue

16. 1. Loose connective tissue
(role in allergy:secrete histamine)
(melanin pigment)
(Phagocytosis)
(e.g. plasma cell: produce antibodies)
Fibrocyte
(fat storage)
Define the different types of cells and fibers in this tissue

18. Loose C.T

19. 2. Dense (fibrous) Connective tissue
Amount of fibers is extensive
Collagen fibers are parallel to each other
Fibroblasts therefore are regularly arranged

20. Dense regular C.T

21. Specialized connective tissue

22. 1. Adipose tissue
Main function: fat storage

23. Adipose tissue

24. 2. cartilage
Main function: provide support and strength

27. Hyaline cartilage
Location: movable joints (articular joint)

29. Elastic cartilage
Location: external ear (auricle of ear)

30. Elastic cartilage

31. 3. Bone tissue
Main function: provide support and strength

32. Compact bones Compact bone: -Haversian system = osteon
-osteocytes within lacunae
-canaliculi
-bone lamellae (concentric)
-Haversian canal (central)

33. X.S of compact bone

34. 4. Blood Erythrocyte: transport of nutrients and oxygen
Monocyte: differentiate into macrophages, present antigen to immune cells
Lymphocyte: production of antibodies
Neutrophil: phagocytosis
Basophil: secrete histamine – allergy reactions
Macrophages: phagocytosis (in connective tissues), present antigen to immune cells
Platelets: blood coagulation

35. Blood

36. c. muscle tissue

37. Muscles
Main function: movement

39. Skeletal muscle

40. Skeletal Muscle

41. Smooth muscle

42. Cardiac muscle

43. Cardiac muscle

44. d. nervous tissue

45. Nervous tissue
Two cell types: neurons (nerve cells) and glial cells (supporting cells)

46. Neurons
Main function of neurons: signal integration and nerve impulse generation

48. Main functions of glial cells: support, protect, nourish, defend neurons