1. The tissue level of organization
Connective, Muscle, and Nervous Tissues

3. Examples of connective tissue
• Solid
– Cartilage
– Bone
– Tendons
– Ligaments
– Fibrous tissues
• Fluid
– Lymph
– Blood

4. Connective tissue functions
• Protection
• Support
• Separation / compartmentalization
• Bind organs together
• Energy storage

7. Loose connective tissue

8. Loose (Areolar) Connective Tissue

9. Loose connective tissue
• Loosely woven fibers produced by fibroblasts
• Three types of fibers
– Collagenous (collagen): tough, parallel bundles
– Elastic (elastin): smaller, still strong, can stretch
– Reticular: v. thin branching strong support

10. Adipose tissue

11. Adipose tissue
• Fat
• Found within loose connective
– Sub cutaneous = adipose + areolar
• Insulation and protection
– Around kidneys, heart surface, joints, behind eye

12. Dense (regular) connective tissue

13. Dense connective tissue
• Interwoven fibrous bundles
• Main components of tendons, aponeuroses
and ligaments
– Tendons connect muscles to bone
– Aponeuroses are sheet like tendons
– Ligaments connect bone to bone

15. Cartilage
• Strong and resilient
• Avascular
• Growth
• Chondrocytes divide
• Chondroblasts become
chondrocytes

16. Types of cartilage
• Hyaline, -most abundant in body
– Shock absorption
– Embryonic skeleton
– At ends of long bones (joints)
– Ribs, nose, larynx, trachea, bronchi, bronchioles
• Fibrocartilage – V. strong and rigid
– Symphysis pubis and between vertebrae
• Elastic – stretches and retains shape
– Epiglottis, external ear, eustachian tubes

17. Bone

19. Muscle Tissue

20. Nervous Tissue