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20 Cards in this Set
- Front
- Back
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Describe Connective Tissue (4): |
* The most common type of tissue * All CT arises from Mesenchyme * Has varying degrees of vascularity * Largely a nonliving ECM |
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What are the three types of Connective Tissue? |
* Loose CT: Areolar, Adipose & Reticular * Dense CT: Regular, Irregular & Elastic * Specialized CT: Bone, Blood & Cartilage |
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What are the functions of Connective Tissue (8)? |
* Binds structures * Provides protection and support * Serves as a framework * Stores fat * Produces blood cells * Protects against infection * Helps repair tissue damage |
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What is Mesenchyme? |
The first CT to appear in an embryo. |
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What gives Connective Tissue their high tensile strength? |
Collagen fibers |
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What are the two types of Collagen fibers and describe them. |
* Irregular: interwoven to resist tension in any direction * Regular: Parallel to force direction |
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What are Fibroblasts? |
* Fixed cell * Most common cell * Large, star shaped * Produces fibers |
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What are Macrophages? |
* Wandering cell * Phagocytic * Important in immunity and prevention infection |
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What are Mast Cells? |
Fixed cells that release Heparin and Histamine. |
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Describe Collagenous Fibers (6). |
* Thick * Made of Collagen * Great tensile strength * Abundant in dense CT * Holds structures together * Appears white in abundance |
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Describe Elastic Fibers (4). |
* Long thin fibers * Form branching networks in the ECM * Great elasticity needed for skin, lungs and blood vessel walls * Appear yellow in abundance. |
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Describe Reticular Fibers (4). |
* Short, thin, collagenous fibers * Highly branched * Form delicate supportive networks * Surround small blood vessels and support the soft tissues of organs |
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Describe Areolar Connective Tissue (6). |
* Mainly Fibroblasts * Gel-like ground substance * Collagenous & Elastic fibers * Binds skin to structures * Beneath most Epithelia * Blood vessels nourish nearby epithelial cells |
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Describe Adipose Connective Tissue (5). |
* Adipocytes * Cushions, insulates and stores fats beneath the skin * Found behind eyeballs, around kidneys and heart and between muscles * Very vascularized * High metabolism, ready energy source |
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What are the two types of fat and describe them. |
Brown fat: Found in babies, many mitochondria, used to heat blood for thermoregulation White fat: nutrition for other cells |
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What is Reticular Connective Tissue (2)? |
* Composed of reticular fibers * Supports internal organ walls, like the liver and spleen |
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What is Dense Regular Connective Tissue (8)? |
* Closely packed collagenous & elastic fibers * Fibroblasts * Very strong * Binds body parts together * Tendons: Muscles to Bone * Ligaments: Bone to Bone * Poor blood supply, slow to heal * Low metabolism |
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What is Dense Irregular Connective Tissue (4)? |
* Randomly organized * Thick, interwoven fibers * Dermis of skin * Found around skeletal muscles |
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What is Elastic Connective Tissue (5)? |
* Abundant in elastic fibers * Some collagenous fibers * Fibroblasts * Forms attachments between bones * Forms walls of large arteries, airways and heart |
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What are the Components, Cells, Fibers, ECM & Features of Connective Tissue? |
* Loose & Dense * Cells: Fibroblasts, Fibrocytes, Defense cells & Adipocytes * Matrix: Gel-like ground substance * Fibers: collagen, reticular & elastic * Features: Six types, vary in density & type of fibers, binding tissue, resists mechanical stress & tension; provides reservoir for water and salts; nutrient (fat) storage |
