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30 Cards in this Set
- Front
- Back
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what is tissue? |
a collection of similarly specialized cells |
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What is epithelium/epithelial tissue? |
covers and lines the external and internal body surfaces including vessels and small cavities. (Buccal mucosa has a14 week turnover time) |
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what are the two types of epithelium/epithelial tissue? |
stratified (layers) and squamous (flattened) |
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What is the function of tissue? |
PROTECTION: -physical (barrier) -chemical -protects against pathogens -protects from heat loss |
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What is connective tissue? |
involved in support, attachment, packing, insulation, storage, transport, repair and defense |
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what is fibroblast? |
-most common cell in all kinds of CT -synthesize protein fibers and intercellular substance -considered fixed cells in CT; do not leave tissue to enter blood |
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What is collagen fibers? |
-main CT fiber found in the body -all CT contains some collagen fibers |
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Types of CT? |
1) loose CT (soft) -in the oral mucosa, gingiva 2) cartilage (firm) 3) Bone (rigid) 4) Blood (fluid) + lymph |
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what is granulation tissue and how does it harm the teeth? |
Extra bacteria on the tooth that you cannot really see. You need to get rid of it so tissues can properly heal. If you don't disease will still be there. |
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What are the types of Loose CT? (oral mucosa) |
1) Stratified (laters) 2) Squamous (flattened) |
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what is the function of LOOSE CT? |
1) physical 2) chemical 3) microbial 4) dehydration 5) heat loss |
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what is cartilage? |
firm, non calcified CT that serves as skeletal tissue |
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What are the two types of cells in LOOSE CT? |
1) Chondroblast (immature)- produce cartilage matrix 2) Chondrocyte (mature)- maintain cartilage matrix |
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What are the functions of the chondrocyte? |
1) forms temporary skeleton on embryo 2) structural support for certain tissues after birth 3) present on TMJ 4) tissue is avascular 5) no nerve supply |
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what tissue is in bone? |
Rigid CT that constitutes most of the mature skeleton |
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functions of bone? |
1) protect and support soft tissues 2) attachment mechanism 3) helps in movement 4) houses RBC's 5) stores calcium and other minerals |
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what are the types of cells found in bone? |
1) osteoblast (bone formation) 2) osterocytes (entrapped mature) 3) osteoclasts (breaks down bone tissue, resorption of bone tissue.) |
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what are the types of bone? (both vascularized) |
a) cancellous (trabecular) -spongy, (MAXILLA) b) Compact (cortical)- strong, fewer spaces (MANDIBLE) |
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Bone is made of how much inorganic and organic material? |
50% inorganic and 50 % organic (calcium hydroxyappetite) this is important for fluoride |
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What is the function of blood? |
transport media for cellular nutrients, respiratory gasses, and metabolites carried in endothelial lined in blood vessels |
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what are the types of blood cells? |
1) RBC's (erythrocytes)= hemogloblin binds and transports oxygen and CO2 2) WBC's (leukocytes)= first line of defense when injury and invasion 3) Thrombocytes (platelets)= important in clotting 4) Monocyte in blood-macrophage in tissue 5) Lymphocytes= 25%-33% of the count |
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Monocytes in blood do what? |
1) respond to chemotactic factors and cytokines; lysosomes 2) precursor of osteoclast |
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What is the function of neural/ nervous tissue? |
receive and conducts impulses based on electrical potential |
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what is a neuron made of? |
1) cell body (metabolic support) 2) dendrite (receives impulses-to cell body) 3) Axon (sends impulses-away from cell body) |
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what is a nerve? |
bundle of NEURAL PROCESSES OUTSIDE THE CNS |
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what is a ganglion? |
bundle of neuron CELL BODIES OUTSIDE THE CNS |
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what is a synapse? |
-Junction between 2 neurons -a neuron and effector organ -contains a neurotransmitter substance to transmit neural impulses by the chemical means. |
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what are the types of muscles? |
-Involuntary= under autonomic control system "dont think about"
-Voluntary= somatic nervous system |
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type of involuntary muscle? |
1) smooth-located in organs, glands, and lining of blood vessels 2) cardiac muscle |
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Type of voluntary muscle? |
Skeletal or striated= includes muscles of the pharynx, upper esophagus, tongue, facial expressions and mastication (chewing) |
