1. PART 3
Tissues

2. Adipose Tissue Description Closely packed adipocytes
Have nucleus pushed to one side by fat droplet
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3. Adipose Tissue Function Location Provides reserve food fuel
Insulates against heat loss
Supports and protects organs
Location
Under skin
Around kidneys
Behind eyeballs, within abdomen and in breasts
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4. Adipose Tissue Figure 4.12c
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5. Reticular Connective Tissue
Description – network of reticular fibers in loose ground substance
Function – form a soft, internal skeleton
(stroma) – supports other cell types
Location – lymphoid organs
Lymph nodes, bone marrow, and spleen
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6. Reticular Connective Tissue
Figure 4.12d
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7. Dense Connective Tissue
Dense irregular connective tissue
Dense regular connective tissue
Elastic connective tissue
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8. Dense Irregular Connective Tissue
Description
Primarily irregularly arranged collagen fibers
Some elastic fibers and fibroblasts
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9. Dense Irregular Connective Tissue
Function
Withstands tension
Provides structural strength
Location
Dermis of skin
Submucosa of digestive tract
Fibrous capsules of joints and organs
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10. Dense Irregular Connective Tissue
Figure 4.12e
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11. Dense Regular Connective Tissue
Description
Primarily parallel collagen fibers
Fibroblasts and some elastic fibers
Poorly vascularized
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12. Dense Regular Connective Tissue
Function
Attaches muscle to bone
Attaches bone to bone
Withstands great stress in one direction
Location
Tendons and ligaments
Aponeuroses
Fascia around muscles
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13. Dense Regular Connective Tissue
Figure 4.12f
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14. Elastic Connective Tissue
Description
Elastic fibers predominate
Function – allows recoil after stretching
Location
Within walls of arteries, in certain ligaments, and surrounding bronchial tubes
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15. Elastic Connective Tissue
Figure 4.12g
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16. Other Connective Tissues
Cartilage
Bone
Blood
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17. Contains no blood vessels or nerves Matrix contains up to 80% water
Cartilage
Firm, flexible tissue
Contains no blood vessels or nerves
Matrix contains up to 80% water
Cell type – chondrocyte
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18. Types of Cartilage Hyaline cartilage Elastic cartilage Fibrocartilage
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19. Hyaline Cartilage Description
Imperceptible collagen fibers (hyaline = glassy)
Chodroblasts produce matrix
Chondrocytes lie in lacunae
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20. Hyaline Cartilage Function Supports and reinforces Resilient cushion
Resists repetitive stress
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21. Hyaline Cartilage Location Fetal skeleton Ends of long bones
Costal cartilage of ribs
Cartilages of nose, trachea, and larynx
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22. Hyaline Cartilage Figure 4.12h
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23. Elastic Cartilage Description Similar to hyaline cartilage
More elastic fibers in matrix
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24. Elastic Cartilage Function Location Maintains shape of structure
Allows great flexibility
Location
Supports external ear
Epiglottis
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25. Elastic Cartilage Figure 4.12i
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26. Fibrocartilage Description Function
Matrix similar but less firm than hyaline cartilage
Thick collagen fibers predominate
Function
Tensile strength and ability to absorb compressive shock
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27. Fibrocartilage Location Intervertebral discs Pubic symphysis
Discs of knee joint
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28. Fibrocartilage Figure 4.12j
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29. Bone Tissue Description
Calcified matrix containing many collagen fibers
Osteoblasts – secrete collagen fibers and matrix
Osteocytes – mature bone cells in lacunae
Well vascularized
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30. Bone Tissue Function Location Supports and protects organs
Provides levers and attachment site for muscles
Stores calcium and other minerals
Stores fat
Marrow is site for blood cell formation
Location
Bones
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31. Bone Tissue
Figure 4.12k
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32. An atypical connective tissue Develops from mesenchyme
Blood Tissue
An atypical connective tissue
Develops from mesenchyme
Consists of cells surrounded by nonliving matrix
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33. Blood Tissue Description Function Location
Red and white blood cells in a fluid matrix
Function
Transport of respiratory gases, nutrients, and wastes
Location
Within blood vessels
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34. Blood Tissue
Figure 4.12l
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