BIO 202 Lecture Notes - Lecture 1: Cell Adhesion, Chondrocyte, Neuroglia
Connective Tissue
- Most abundant and widely distributed of primary tissues
- Four main classes
oConnective tissue proper
oCartilage
oBone
oBlood
Connective Tissue Proper
- All connective tissues except bone, cartilage and blood
- Subclass
oLoose connective tissue
Areolar
Adipose
Reticular
oDense connective tissue (fibrous connective tissues)
Regular
Irregular
Elastic
- Cells
oFibroblasts
oFibrocytes
oDefense cells
oAdipocytes
- Matrix
oGel-like ground substance
oAll three fiber types
Collagen
Reticular
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Elastic
- General Features
o6 different types
Vary in density and types of fibers
oFunctions as a binding tissue
oResist mechanical stress, particularly tension
oProvides reservoir for water and lasts
oNutrient (fat) storage
Cartilage
- Subclass
oHyaline cartilage
oElastic cartilage
ofibrocartilage
- Cells
oChondroblasts found in growing cartilage
ochondrocytes
- Matrix
oGel-like ground substance
oFibers
Collagen, Elastic fibers in some
- General Features
oResist compression because of the large amounts of water held in the matrix
oFunctions to cushion and support body structures
Bone Tissue
- Subclass
oCompact bone
oSpongy bone
- Cells
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oOsteoblast
oOsteocytes
- Matrix
oGel-like ground substance calcified with inorganic salts
oFibers
collagen
- General Features
oHard tissue that resist both compression and tension
oFunctions in support
Blood
- Cells
oErythrocytes (RBC)
oLeukocytes (WBC)
oplatelets
- Matrix
oPlasma
oNo fibers
- General Features
oA fluid tissue
oFunctions to carry O2, CO2, nutrients, wastes, and other substances
Ex: hormones
Major Functions of Connective Tissue
- Binding and support
- Protecting
- Insulating
- Storing reserve fuel
- Transporting substances (blood)
Characteristics of Connective Tissue
- Three characteristics make connective tissues different from other primary tissues
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