Post on 23-Dec-2015
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Connective Tissue
Types of Connective Tissue
• Osseous Tissue (Bone Tissue)
• Loose Connective Tissue– Areolar Tissue– Adipose Tissue– Reticular Connective Tissue
• Dense Connective Tissue
• Cartilage
• Blood
Osseous Tissue
• Hard
• Calcified matrix containing many collagen fibers
• Osteocytes lie in lacunae
• Well vascularized
Location
• Found in bones
Function
• Bone supports and protects
• Provides levers for the muscles to act on
• Stores calcium, minerals, and fat
• Marrow inside bones- site for blood cell formation
Bone Tissue
Areolar Tissue
• Gel – like matrix composed of all types of fibers
• Contains phagocytes, white blood cells
Location of Areolar Tissue
• Lamina propria is found under mucous membranes
• Internal organs
Functions of Areolar Tissue
• Wraps and cushions organs
• Phagocytes engulf bacteria
• Holds and conveys tissue fluid (water, salts, nutrients)
Areolar Tissue
Adipose Tissue
• Closely packed fat cells have nucleus pushed to the side by large fat droplet.
• Similar matrix to areolar tissue
Location of Adipose Tissue
• Under skin
• Around kidneys and eyeballs
• In bones
• Within abdomen
• In breasts
Function of Adipose Tissue
• Provides reserve food fuel
• Insulates against heat loss
• Supports and protects organs
1. Cell membrane
2. Nucleus
3. Fat vacuole
Reticular Connective Tissue
• Network of reticular fibers in a typical loose ground substance; reticular cells predominate.
Location of Reticular Tissue
• Lymphoid organs (lymph nodes, bone marrow, and spleen)
Function of Reticular Tissue
• Fibers form a soft internal skeleton (stoma) that supports other cell types (specially blood cells)
Dense Connective Tissue
• Primarily collagen fibers
• A few elastic fibers
• Major cell type is the fibroblast
Location of Dense Connective Tissue
• Tendons
• Most Ligaments
• Aponeurosis
Function of Dense Connective Tissue
• Attaches muscles to bones or muscles
• Attaches bones to bones
• Withstands great tensile stress
Dense Connective Tissue
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Cartilage
• Hyaline cartilage – abundant collagen fibers in rubbery matrix; blue-white appearance; most abundant
• Elastic cartilage – yellowish appearance
• Fibrocartilage
Location of Hyaline Cartilage
• Forms most of the embryonic skeleton
• Covers the ends of long joints in joint cavities
• Forms coastal cartilage of the ribs
• Cartilage of nose, trachea, and larynx
Location of Elastic Cartilage
• External ear • Disk between vertebrae of spinal column
Location of Fibrocartilage
Function of Cartilage Tissue
• Supports and reinforces
• Has cushioning properties
• Resists compression
Hyaline Cartilage
Vascular Tissue (Blood)
• Blood cells surrounded by blood plasma
• Fibers in blood are not visible until clotting occurs