Histology of Epithelia/Connective Tissue Flashcards
Four Basic Tissue Types.
____ – ___or ___ ___
___ ___ – ___ ___
___-___
____ – ___
Four Basic Tissue Types.
ØEpithelia – cover or line surfaces.
ØConnective tissues – support organs
ØMuscle -contractility.
ØNerves – communication.
Characteristics of All Epithelia.
ØCover or line surfaces.
Ø____ ____ of cells.
Ø____ intercellular material.
Ø____ (vascularity)
ØAlways have a ___ ___
ØContain _____ ____ of ____
ØCover or line surfaces.
ØCohesive sheets of cells.
ØLittle intercellular material.
ØAvascular.
ØAlways have a basement membrane.
ØContain intermediate filaments of cytokeratins.
Epithelia Functions
- ØResistant to ___
- Ø___barrier against ____ organisms and other substances.
- _____ barrier - 2 way.
- ____ barrier
- le.g. ____
- ___ ____
- _____ – endocytosis.
- lining of ___, ___ ___
- ____ epithelium.
- ____ - most ____ are derived from epithelium.
Epithelia Functions
ØResistant to abrasion.
ØMechanical barrier against invasive organisms and other substances.
Ø
ØPermeability barrier - 2 way.
Ø
ØImmunologic barrier
le.g. skin
lmucous membranes
ØAbsorption – endocytosis.
llining of lungs, blood vessels.
lintestinal epithelium.
Ø
ØSecretion - most glands are derived from epithelium.
Ø
Other Functions.
____, neuroepithelial cells
- ___, ____ ___
l
Heat___ -minimal in humans.
Ø
_____.
- myoepithelial cells e.g. in salivary glands
_____- melanocyte cells.
Other Functions.
ØSensation, neuroepithelial cells
lTongue, taste buds
l
ØHeat loss -minimal in humans.
Ø
ØContraction.
lmyoepithelial cells e.g. in salivary glands
l
ØPigmentation - melanocyte cells.
Basic Epithelial Structure
ØEpithelial cells are generally ____
____ region
___surfaces
___ region
ØOrganelles located at specific ___ in each cell.
Basic Epithelial Structure
ØEpithelial cells are generally polarized
lApical region
lLateral surfaces
lBasal region
ØOrganelles located at specific locations in each cell.
Surface Specializations.
____
lassociated with cells active in ____
l
____
lAssociated with cells whose function is ___ of ___ material.
•
ØMicrovilli
lassociated with cells active in absorption.
l
ØCilia
lAssociated with cells whose function is movement of surface material.
•
Cytoskeleton
ØCytoskeleton is composed of a filamentous array of ____s that provide a ____ framework for the cell and to ____ material within it.
ØThere four components to the cytoskeleton: ____,____ ___, ___ ___s and ___ ___
Ø
Cytoskeleton
ØCytoskeleton is composed of a filamentous array of proteins that provide a structural framework for the cell and to transport material within it.
ØThere four components to the cytoskeleton: microtubles, thin filaments, intermediate filaments and thick filaments.
Ø
Filament Protein Composition
Protein components include:
____ (Epithelia)
Vimentin (Fibroblasts, endothelial cells, mysenchymal cells)
Desmin & Vimentin (Muscle)
GFAP & Vimentin (Neurons)
Neurofilaments (Neurons)
Lamins A, B &C (Nuclear envelopes)
Filament Protein Composition
Protein components include:
Keratins (Epithelia)
Vimentin (Fibroblasts, endothelial cells, mysenchymal cells)
Desmin & Vimentin (Muscle)
GFAP & Vimentin (Neurons)
Neurofilaments (Neurons)
Lamins A, B &C (Nuclear envelopes
Intercellular attachments.
ØJunctional complex components.
- ___ ___ – a band that ____ around ____ with adjacent cells.
- ___ ___ – an ____ band ___ adjacent cells
- ___ ___- ___, ___ adhesions around cell and ____ area for ___ ___
- ___ ___ - ____ between adjacent cells.
Intercellular attachments.
ØJunctional complex components.
lZonula occludens – a band that seals around contacts with adjacent cells.
lZonula adherens – an adhesion band between adjacent cells
lMacula adherens- desmosome, spot adhesions around cell and attachment area for intermediate filaments.
lGap junction - communication between adjacent cells.
Hemi Desmosomes.
ØBetween an ___ cell and the underlying ___ ___. The other side of the basement membrane is ____ material so there is not __ ___ with another cell.
Ø
ØBetween an epithelial cell and the underlying basement membrane. The other side of the basement membrane is extracellular material so there is not direct contact with another cell.
Ø
Basement Membrane.
- __ ___
- lProduced by the ___ ___
- lLamina
- ___
- ___
- ___ ___
- lProduced by the underlying __ ___ ___
Basement Membrane.
ØBasal lamina
lProduced by the epithelial cells
lLamina lucida
lLamina densa
ØReticular lamina
lProduced by the underlying connective tissue cells
Basal Lamina
ØRemember:
lThe basal lamina always lies at the interface between ___ ___ and __ ___ (fuses to __ ___
lSometimes, __ basal laminas can ___ if there is no intervening ___ ___
Basal Lamina
ØRemember:
lThe basal lamina always lies at the interface between epithelial cells and connective tissue (fuses to reticular lamina)
lSometimes, two basal laminas can fuse if there is no intervening connective tissue
Epithelial Cell Classification.
ØShape of the surface layer of cells:
___ (flattened cells)
___
____
l
ØAccording to number of cell layers
___layer -___ epithelia
lMore than one layer -____ epithelia
Epithelial Cell Classification.
ØShape of the surface layer of cells:
lSquamous (flattened cells)
lCuboidal
lColumnar
l
ØAccording to number of cell layers
lSingle layer - simple epithelia
lMore than one layer -stratified epithelia
Simple Squamous.
ØIn those areas where ___ ___ is essential.
lLining ___ and ___ ___
lLining areas in ___ where gaseous exchange takes place
___ ___ for ____of plasma.
Simple Squamous.
ØIn those areas where rapid diffusion is essential.
lLining blood and lymphatic vessels.
lLining areas in lung where gaseous exchange takes place
lKidney glomerulus for filtering of plasma.
Simple Cuboidal.
Ø
ØIn areas where a little more ___ is required.
___
___ ___
Simple Cuboidal.
Ø
ØIn areas where a little more processing is required.
lGlands.
lKidney tubules.
Simple Columnar
Ø
ØCells that are involved in ___ and ___ of materials
lCells lining the ___ and ___
Simple Columnar
Ø
ØCells that are involved in absorption and processing of materials
lCells lining the small and large intestines.
Pseudostratified.
Ø
)___ of several layers BUT the ___ are at ___ __ and all the cells have a ___ __ to the__ ___
____ tract.
lEpithelium is often known as ____ ____ ___with goblet cells (or as respiratory epithelium).
Pseudostratified.
Ø
ØAppearance of several layers BUT the nuclei are at different levels and all the cells have a direct connection to the basement membrane.
lRespiratory tract.
lEpithelium is often known as pseudostratified ciliated columnar with goblet cells (or as respiratory epithelium).
Stratified Epithelia.
ØThose epithelia with ___ or ___layers of cells.
Ø
ØStratified epithelia are named according to the ___ of the cells on the ____
lStratified squamous.
lStratified cuboidal.
lStratified columnar.
Stratified Epithelia.
ØThose epithelia with 2 or more layers of cells.
Ø
ØStratified epithelia are named according to the morphology of the cells on the surface.
lStratified squamous.
lStratified cuboidal.
lStratified columnar.
Stratified Squamous Epithelia.
ØMultiple layers.
ØCells on the surface are flattened or squamous.
ØThe ___ differentiated cells are adjacent to the ___ ___ and the most differentiated cells are on the ___
Ø
ØTwo functionally distinct types.
lStratified squamous ___
lStratified squamous___ ___
Ø
ØBoth types ___ ___ but the____ of keratinization varies.
Ø
Stratified Squamous Epithelia.
ØMultiple layers.
Ø
ØCells on the surface are flattened or squamous.
Ø
ØThe least differentiated cells are adjacent to the basement membrane and the most differentiated cells are on the surface.
Ø
ØTwo functionally distinct types.
lStratified squamous keratinized.
lStratified squamous non-keratinized
Ø
ØBoth types contain keratin but the degree of keratinization varies.
Ø
Stratified Squamous Keratinized.
___ ___ ____ is their major function but all have a distinct surface layer
____
l
ØThe degree of ___ varies
lThinner epithelium at ____ – provides some ___ and some ___ to abrasion
lThick epithelium on ___ of __ –very ___ fexibility but ___ resistance to abrasion.
Stratified Squamous Keratinized.
ØResistance to abrasion is their major function but all have a distinct surface layer
lSkin.
l
ØThe degree of resistance varies
lThinner epithelium at eyelids – provides some flexibility and some resistance to abrasion
lThick epithelium on soles of feet –very limited flexibility but great resistance to abrasion.
Stratified Squamous Non-keratinized.
____ flexibility but___ resistance to abrasion and ____ by organisms.
____ distinct ___ ___, ____ are found in the surface cells.
ØResistance is due to a ___ ____ maintained by a ___ rate of ___
lEsophagus
___ ___ - buccal mucosa
lVagina
Stratified Squamous Non-keratinized.
ØGreat flexibility but less resistance to abrasion and invasion by organisms.
Ø
ØNo distinct surface layer, nuclei are found in the surface cells.
ØResistance is due to a thick epithelium maintained by a high rate of proliferation
lEsophagus
lOral mucosa - buccal mucosa
lVagina
Stratified Cuboidal.
ØTwo or more cell layers with a cuboidal luminal layer.
lDuct of exocrine ___ glands.
lSome of the larger ___ gland ducts.
Stratified Cuboidal.
ØTwo or more cell layers with a cuboidal luminal layer.
lDuct of exocrine sweat glands.
lSome of the larger salivary gland ducts.
Stratified Columnar
ØSurface cells are columnar
lIn the larger ducts of ___ ___
Stratified Columnar
ØSurface cells are columnar
lIn the larger ducts of salivary glands.
Transitional Epithelium.
ØEpithelium in which the ____ changes with ____ changes
ØCells on the surface have a characteristic ___ luminal surface.
lAlso known as___ cells or ___ cells.
ØCells may be ____
____tract - bladder. The thickness of the epithelium changes to accommodate ____ and allows the bladder to ___
- ___(contracted) state
- ___state
Transitional Epithelium.
ØEpithelium in which the thickness changes with functional changes
ØCells on the surface have a characteristic convex luminal surface.
lAlso known as facet cells or dome cells.
ØCells may be binucleate.
ØUrinary tract - bladder. The thickness of the epithelium changes to accommodate urine and allows the bladder to distend.
lRelaxed (contracted) state
lExtended state
Specialized Epithelial Cells
Myoepithelial cells
specialized for____
l
Specialized Epithelial Cells
Myoepithelial cells
specialized for contraction
l
Specialized Epithelial Cells
____epithelial cells
___cells
__ ___ cells
Specialized Epithelial Cells
Neuroepithelial cells
lOlfactory cells
l
l
l
l
lTaste bud cells
l
Gland Classification According to:
ØMorphology of the __ ___
- lSimple coiled tubular etc.
ØType of____:
- lMucous, serous, mixed
ØMethod of _____
- lMerocrine
- lHolocrine
- lApocrine
Gland Classification According to:
ØMorphology of the duct system.
lSimple coiled tubular etc.
ØType of secretion:
lMucous, serous, mixed
ØMethod of secretion
lMerocrine
lHolocrine
lApocrine
Classification by mode of secretion
Holocrine glands - accumulate products until cell ____. example…. ___ glands
Merocrine glands - secrete products (as soon as product are ___) by ____
examples….pancreas, sweat, and salivary.
Apocrine glands - ____ of products, then ___ of cell __ ___ example… ___ glands.
Classification by mode of secretion
Holocrine glands - accumulate products until cell ruptures. example…. sebaceous glands
Merocrine glands - secrete products (as soon as product are made) by exocytosis.
examples….pancreas, sweat, and salivary.
Apocrine glands - accumulation of products, then apex of cell pinches off. example… mammary glands.
Goblet Cells – UNICELLULAR gland cells stained to show the mucin.
Goblet Cells – UNICELLULAR gland cells stained to show the mucin.
Gland Organization
ØProducts are secreted into ___
ØThen move through series of increasingly ___ ducts
ØSecretory vs. Ductal portions of glands
Gland Organization
ØProducts are secreted into acinus
ØThen move through series of increasingly larger ducts
ØSecretory vs. Ductal portions of glands
Acinus to Ducts
Acinus
Intercalated
Striated
Interobular
Acinus to Ducts
Summary
ØEpithelia cover and protect surfaces
ØEpithelia cells are joined to one another via intercellular attachments, and to underlying tissue via the basement membrane
ØEpithelia are classified by shape of cell, and layers of cells
ØGlands consist of ____ epithelial cells –___ and ___
ØGlands may be classified according to:
lMorphology of the duct system
lMethod of secretion
lType of secretion
Summary
ØEpithelia cover and protect surfaces
ØEpithelia cells are joined to one another via intercellular attachments, and to underlying tissue via the basement membrane
ØEpithelia are classified by shape of cell, and layers of cells
ØGlands consist of specialized epithelial cells – secretory and duct.
ØGlands may be classified according to:
lMorphology of the duct system
lMethod of secretion
lType of secretion
What is Connective Tissue?
Connective Tissue is found throughout the body. In fact the whole framework of the skeleton and the different specialized connective tissues from the crown of the head to the toes determine the form of the body and act as an entity.
Ø
What is Connective Tissue?
Connective Tissue is found throughout the body. In fact the whole framework of the skeleton and the different specialized connective tissues from the crown of the head to the toes determine the form of the body and act as an entity.
Ø
CT - General Functions.
ØMaintenance of ___ ___
Ø____and ____ of tissues.
Ø___ via ___ immune cells and a gelatinous __ __
Ø___ via stored materials in ___ ___.
CT - General Functions.
ØMaintenance of structural integrity.
ØSupport and delineation of tissues.
ØDefense via contained immune cells and a gelatinous ground substance.
ØNutrition via stored materials in extracellular matrix.
Components.
ØAll connective tissues have two major components:
___ ___
- ____
- ___ ___
____
__ or ___ cells (___ present).
___(only present when ___).
Components.
ØAll connective tissues have two major components:
Ø
ØExtracellular matrix (ECM).
lFibers.
lGround substance.
ØCells.
lFixed or resident cells (always present).
lTransient (only present when needed).
Four Categories of CT
____ CT: Mesenchymal & ____
ØCT ___: Loose, Reticular, Adipose, Dense Irregular & Dense Regular.
____ CTs: ___& ___
____
Four Categories of CT
ØEmbryonic CT: Mesenchymal & Mucous
ØCT Proper: Loose, Reticular, Adipose, Dense Irregular & Dense Regular.
ØSpecialized CTs: Bone & Cartilage.
ØBlood
Extracellular Matrix-Fibers.
- ____
- ____
- ___(a type of collagen).
- ____, ___and ____
- ____ (=elastic fibers)
- ____
ØCollagen.
lSupport.
l
ØReticulin (a type of collagen).
lSupport, attachment and compartmetalization
l
ØElastin (=elastic fibers)
lFlexibility.
Collagen.
ØThe ___ fiber component of most connective tissues.
lSynthesized chiefly by ____
lContinually _____ - breakdown and new synthesis of collagen.
lCharacteristic 64 nm periodicity.
lOrganized as ___of collagen fibers.
lOver ___ different types of collagen.
ØThe major fiber component of most connective tissues.
lSynthesized chiefly by fibroblasts.
lContinually metabolized - breakdown and new synthesis of collagen.
lCharacteristic 64 nm periodicity.
lOrganized as bundles of collagen fibers.
lOver 20 different types of collagen.
Collagen Organization.
ØCollagen microfibrils, fibrils, fibers and bundles.
Microfibrils show a periodicity of light and dark bands with a 64 nm periodicity. This periodicity is explained by the approximately ¼ overlap of 280nm long rod like tropocollagen molecules. Microfibrils align in parallel to form____and fibrils to form____.
Collagen bundles are bound together by layers of ____ connective tissue to form ___ and fasicles to form larger structures such as ____
Ø
ØCollagen microfibrils, fibrils, fibers and bundles. Microfibrils show a periodicity of light and dark bands with a 64 nm periodicity. This periodicity is explained by the approximately ¼ overlap of 280nm long rod like tropocollagen molecules. Microfibrils align in parallel to form fibrils and fibrils to form fibers. Collagen bundles are bound together by layers of irregular connective tissue to form fasicles and fasicles to form larger structures such as tendons.
Ø
Collagen Formation
Characteristic 640 nm periodicity
Collagen Formation
Characteristic 640 nm periodicity
Reticulin (Reticular fibers).
ØA type of collagen with its ___ fibers often forming ___networks
- ___ ___
- ___ ___
Ø___philic i.e. usually shown with ___ stains because of its___ affinity for silver salts.
Ø
ØNot normally visible with ___ and ___ staining.
Reticulin (Reticular fibers).
ØA type of collagen with its fine fibers often forming supporting networks
lBone marrow.
lLymphatic organs.
Ø
ØArgyrophilic i.e. usually shown with silver stains because of its high affinity for silver salts.
Ø
ØNot normally visible with hematoxylin and eosin staining.
Reticular Fibers
Fine black fiber networks as in this section of a lymph node.
Reticular Fibers
Fine black fiber networks as in this section of a lymph node.
Elastic Fibers (Elastin).
___, very ___, ___ fibers.
ØFine fibers ____ through ___ connective tissues.
ØProminent in the walls of ___ ____- with some ___ ___
ØIn elastic arteries (e.g. aorta) may form ___ ___
Elastic Fibers (Elastin).
ØLong, very slender, branching fibers.
ØFine fibers scattered through many connective tissues.
ØProminent in the walls of muscular arteries - with some thick bundles.
ØIn elastic arteries (e.g. aorta) may form elastic networks.
Extracellular Matrix (Ground Substance).
ØA ___, ____ material surrounding ___and ___ and containing a variety o____ and structural ____
ØCapable of ___ of fluid, minerals etc.
ØCan provide an effective ____ to migration of some organisms.a
Extracellular Matrix (Ground Substance).
ØA viscous, gelatinous material surrounding cells and fibers and containing a variety of glycosaminoglycans and structural glycoproteins.
ØCapable of storage of fluid, minerals etc.
ØCan provide an effective barrier to migration of some organisms.a
Extracellular Matrix.
ØSome common Glycosaminoglycans.
lchondroitin 4-sulfate
lchondroitin 6-sulfate
lhyaluronic acid
ldermatan sulfate
lkeratan sulfate
lheparin sulfate
lheparin
Extracellular Matrix.
ØSome common Glycosaminoglycans.
lchondroitin 4-sulfate
lchondroitin 6-sulfate
lhyaluronic acid
ldermatan sulfate
lkeratan sulfate
lheparin sulfate
lheparin
ØSome Structural Glycoproteins.
llaminin
lfibronectin
lchondronectin
losteonectin
lintegrins
ØSome Structural Glycoproteins.
llaminin
lfibronectin
lchondronectin
losteonectin
lintegrins
Extracellular Matrix.
ØSome components of the ECM such as fibronectin allow ____ of certain cell types and are also be involved in cell ___
ØThis may be critical during ___, during___ and in ___ ___
Extracellular Matrix.
ØSome components of the ECM such as fibronectin allow attachment of certain cell types and are also be involved in cell migration.
ØThis may be critical during development, during infections and in wound healing.
Connective Tissue Proper Cells.
___ ___ cells act as __ __ for most of the connective tissue cells including:
____
___ cells
____ cellls
____
Connective Tissue Proper Cells.
ØUndifferentiated mesenchymal cells act as stem cells for most of the connective tissue cells including:
lFibroblasts
lMesothelial cells
lEndothelial cells
lAdipocytes
Two Types of Connective Tissue Cells.
Ø___ resident)cells.
lThese are always present in most of the connective tissues.
l
Ø____ cells.
lThese ___ into and away from connective tissues when ____, often via a ____ gradient e.g. in ___ ___, to combat invasion of organisms.
Two Types of Connective Tissue Cells.
ØFixed (resident)cells.
lThese are always present in most of the connective tissues.
l
ØTransient cells.
lThese migrate into and away from connective tissues when needed, often via a chemotactic gradient e.g. in wound healing, to combat invasion of organisms.
Fixed Connective Tissue Cells.
ØInclude:
____ mesenchymal cells.
____ (and fibrocytes- resting fibroblasts)
____ (fat cells).
__ __
lFixed ___
___(associated with capillaries).
lOther cells in specialized connective tissues.
Fixed Connective Tissue Cells.
ØInclude:
lUndifferentiated mesenchymal cells.
lFibroblasts (and fibrocytes- resting fibroblasts)
lAdipocytes (fat cells).
lMast cells.
lFixed macrophages.
lPericytes (associated with capillaries).
lOther cells in specialized connective tissues.
Fibroblasts.
- ___ ___ connective tissue cell.
- ____ (synthesizes and degrades) a variety of substances including:
- ___
- __
- •___
- __ ___ components
- ____ (synthesizes and degrades) a variety of substances including:
- ØThese substances may also be ___ by some other CT cells.
ØMost common connective tissue cell.
lMetabolizes (synthesizes and degrades) a variety of substances including:
- Collagens
- Reticulin
- Elastin
- Ground substance components
ØThese substances may also be synthesized by some other CT cells.
Adipose CT.
ØStores___ and ____ tissues, provides ___ reserve as in ___ layers of the skin.
ØComposition:
- lRelatively ___ cells.
- ____ amounts of fibers.
- lCells known as___
- lYellow and brown fat.
Adipose CT.
ØStores fat and cushions tissues, provides energy reserve as in deeper layers of the skin.
ØComposition:
lRelatively few cells.
lLimited amounts of fibers.
lCells known as adipocytes.
lYellow and brown fat.
Transient CT Cells Include.
- ___ cells.
- lNeutrophils
- lLymphocytes
- lPlasma cells
- ___
- ___ ___
- ØTransient _____
- ____ cells e.g. melanocytes.
ØImmune cells.
lNeutrophils
lLymphocytes
lPlasma cells
lEosinophils
lMast cells
Ø
ØTransient macrophages
ØPigment cells e.g. melanocytes.
Plasma Cells.
___shaped cell.
ØNucleus to __ __ of the cell.
ØCharacteristic “__ __” nuclear chromatin pattern.
Ø____ cytoplasm.
Ø“____ ____” – a region near the ____ that is generally ____
ØOval shaped cell.
ØNucleus to one side of the cell.
ØCharacteristic “clock face” nuclear chromatin pattern.
ØBasophilic cytoplasm.
Ø“Negative Golgi” – a region near the nucleus that is generally unstained.
Connective Tissue Proper.
____ CT (loose CT).
___ ___
___ ___
ØCT with ___ ___
Ø
Connective Tissue Proper.
ØAreolar CT (loose CT).
ØDense irregular.
ØDense regular.
ØCT with special properties.
Ø
Areolar (loose) CT.
Ø____ (filmy) tissue filling spaces ___ ___ and ___tissues – the thin connective tissue membrane over muscles, mesentery.
Ø
ØComposition:
- ___ fibers
- ___ cells
- __ ___ of ground substance
- Ø
Areolar (loose) CT.
ØMembranous (filmy) tissue filling spaces around organs and delineating tissues – the thin connective tissue membrane over muscles, mesentery.
Ø
ØComposition:
lRelatively few fibers
lRelatively few cells
lLarge amounts of ground substance
Ø
Dense Irregular CT.
ØProvides ____ support and ____ e.g. in the dermis of skin.
Ø
ØComposition:
- ____ of fibers (mostly ___).
- lFibers often arranged as __ ___
- ___ ___ of ground substance.
- ___ ___cells.
- Ø
- l
Dense Irregular CT.
ØProvides structural support and barrier e.g. in the dermis of skin.
Ø
ØComposition:
lLarge amounts of fibers (mostly collagen).
lFibers often arranged as irregular bundles.
lSmall amounts of ground substance.
lRelatively few cells.
Ø
l
Dense Regular CT.
ØProvides ___ ___ support e.g. tendon.
ØComposition:
- lFibers arranged in ____ manner.
- lCells oriented along ___ ___
- lRelatively ___ cells.
- ____amounts of ground substance.
Dense Regular CT.
ØProvides linear structural support e.g. tendon.
ØComposition:
lFibers arranged in linear manner.
lCells oriented along fiber directions.
lRelatively few cells.
lSmall amounts of ground substance.
Dense Regular CT.
Tendon.
Ø
Ø
ØNote the fibroblast nuclei, following the orientation of the collagen fibers.
Ø
Dense Regular CT.
Tendon.
Ø
Ø
ØNote the fibroblast nuclei, following the orientation of the collagen fibers.
Ø
CT with Special Properties.
ØThis classification often varies in different texts.
- ___ connective tissue.
- ___ connective tissue.
- ___connective tissue.
- ____ CT
- ___connective tissue.
CT with Special Properties.
ØThis classification often varies in different texts.
lAdipose connective tissue.
lElastic connective tissue.
lReticular connective tissue.
lHematopoietic CT
lLymphatic connective tissue.
