TissuesTissues

• Four basic tissuesFour basic tissues

• Compose all the Compose all the organsorgans

• Make up all the Make up all the structures and structures and body contentbody content

Epithelial/ Connective/ Muscle/ Nerve/ Credits

Epithelial TissueEpithelial Tissue

• Widespread Widespread throughout bodythroughout body

• Covers all body Covers all body surfacessurfaces

• Major tissue in Major tissue in glandsglands

Tissues/ Stratified/ Simple

Simple TissueSimple Tissue

• Functions:Functions:

• AbsorptionAbsorption

• SecretionSecretion

• FiltrationFiltration

Tissues/ Epithelial/ columnar/ pseudostratified columnar/ cuboidal/ squamous

Simple ColumnarSimple Columnar

• Elongated column Elongated column shaped cellsshaped cells

• Located near base Located near base of cellsof cells

• Specialized for Specialized for sensory receptionsensory reception

Tissues/ simple/ pseudostratified columnar/ cuboidal/ squamous

Simple PseudostratifiedSimple Pseudostratified

• More than one More than one layer of cellslayer of cells

• Disposed at Disposed at different levelsdifferent levels

• Illusion of cellular Illusion of cellular stratificationstratification

Tissues/ simple/ columnar/ cuboidal/ squamous

Simple CuboidalSimple Cuboidal

• Square shapedSquare shaped

• Spherical nucleus Spherical nucleus in the centerin the center

• Found in kidney Found in kidney tubules and gland tubules and gland ductsducts

Tissues/ simple/ pseudostratified columnar/ squamous/ columnar

Simple SquamousSimple Squamous

• Flattened cellsFlattened cells

• Disc-shaped nucleiDisc-shaped nuclei

• Sparse cytoplasmSparse cytoplasm

Tissues/ simpele/ columnar/ pseudostratified columnar/ cuboidal

Stratified TissueStratified Tissue

• Withstand wear Withstand wear and tearand tear

• Composed of Composed of several layersseveral layers

• Top cells flat and Top cells flat and scalyscaly

Tissues/ Epithelial/ columnar/ transitional/ squamous/ cuboidal

Stratified ColumnarStratified Columnar

• Not very commonNot very common

• Found in bulbar Found in bulbar conjunctivaconjunctiva

• Limited distributionLimited distribution

Tissues/ stratified/ transitional/ cuboidal/ squamous

Stratified Transitional Stratified Transitional ColumnarColumnar• Dome-shaped Dome-shaped

surface prevents surface prevents urine from contact urine from contact tissuestissues

• Can stretch in Can stretch in responds to responds to bladder fillingbladder filling

Tissues/ stratified/ columnar/ cuboidal/ squamous

Stratified CuboidalStratified Cuboidal

• Dome-shaped Dome-shaped surface prevents surface prevents urine from contact urine from contact tissuestissues

• Can stretch in Can stretch in responds to responds to bladder fillingbladder filling

Tissues/ stratified/ columnar/ transitional/ squamous

Stratified SquamousStratified Squamous

• Most widespreadMost widespread

• Several thick layersSeveral thick layers

• Protective role in Protective role in the bodythe body

Tissues/ stratified/ columnar/ transitional/ cuboidal

Connective TissueConnective Tissue

• Bind structures Bind structures togethertogether

• Form frameworkForm framework

• Supports organsSupports organs

Tissues/ proper/ cartilage/ bones/ blood

Connective ProperConnective Proper

• Has two subclassesHas two subclasses

• Loose connectiveLoose connective

• Dense connectiveDense connective

Tissue/ connective/ loose/ dense

Connective Loose TissueConnective Loose Tissue

• SupportsSupports

• BindsBinds

• Structures and Structures and body parts of other body parts of other tissuestissues

Tissues/ proper/ adipose/ reticular/ areolar

Loose Adipose TissueLoose Adipose Tissue

• Cells packed tightly Cells packed tightly togethertogether

• Adipose tissue is Adipose tissue is richly vascularizedrichly vascularized

• Develops most Develops most anywhereanywhere

Tissues/ loose/ reticular/ areolar

Loose Reticular tissueLoose Reticular tissue

• Similar to areolar Similar to areolar tissuetissue

• Reticular fibersReticular fibers

• Reticular cells Reticular cells spread throughoutspread throughout

Tissues/ loose/ adipose/ areolar

Loose Areolar TissueLoose Areolar Tissue

• Supports and binds Supports and binds tissuestissues

• Holding body fluidsHolding body fluids

• Defending against Defending against infectionsinfections

Tissues/ loose/ adipose/ reticular

Connective Dense TissueConnective Dense Tissue

• Collagen bundled Collagen bundled in parallel patternin parallel pattern

• Tendons connect Tendons connect muscle to bonemuscle to bone

• Ligaments connect Ligaments connect bone to bonebone to bone

Tissues/ proper/ elastic/ irregular/ regular

Dense Elastic TissueDense Elastic Tissue

• FlexibleFlexible

• Produced by Produced by fibroblastsfibroblasts

• Composed of Composed of elastinelastin

Tissues/ dense/ irregular/ regular

Dense Regular TissueDense Regular Tissue

• Packed bundles of Packed bundles of collagencollagen

• Resistance to Resistance to tensiontension

• Parallel to pullParallel to pull

Tissues/ dense/ irregular/ elastic

Dense Irregular TissueDense Irregular Tissue

• Fibers thickerFibers thicker

• Arranged Arranged irregularlyirregularly

• Similar in structure Similar in structure to dense regularto dense regular

Tissues/ dense/ regular/ elastic

Cartilage TissueCartilage Tissue

• ToughTough

• FlexibleFlexible

• Stands up to Stands up to compression and compression and extensionextension

Tissues/ connective/ proper/ bones/ blood

Hyaline CartilageHyaline Cartilage

• Most abundant in Most abundant in bodybody

• Large number of Large number of collagen fiberscollagen fibers

• Collagen fibers are Collagen fibers are not visiblenot visible

Tissues/ cartilage/ fibrocartilage/ elastic

FibrocartilageFibrocartilage

• Rows of thick Rows of thick collagen fiberscollagen fibers

• Compresses wellCompresses well

• Resists tension wellResists tension well

Tissues/ cartilage/ Hyaline/ elastic

Elastic CartilageElastic Cartilage

• Identical to hyaline Identical to hyaline cartilagecartilage

• Many elastic fibersMany elastic fibers

• Used for durabilityUsed for durability

Tissues/ cartilage/ Hyaline/ fibrocartilage

Bone TissueBone Tissue

• Bone tissue is very Bone tissue is very hardhard

• Used for supportUsed for support

• Protects the bodyProtects the body

Tissues/ connective/ proper/ cartilage/ blood

Blood TissueBlood Tissue

• Most atypicalMost atypical

• Does not connect Does not connect thingsthings

• Develops from Develops from MesnechymeMesnechyme

Tissues/ connective/ proper/ bones/ cartilage

Muscle TissueMuscle Tissue

• Highly cellularHighly cellular

• Well VascularizedWell Vascularized

• Responsible for Responsible for body movementbody movement

Tissues/ smooth/ skeletal/ cardiac

Cardiac Muscle TissueCardiac Muscle Tissue

• Propels bloodPropels blood

• StriatedStriated

• Found in the wall of Found in the wall of the heartthe heart

Tissues/ Muscle/ skeletal/ smooth

Skeletal Muscle TissueSkeletal Muscle Tissue

• Packaged into Packaged into skeletal musclesskeletal muscles

• Cause movementCause movement

• Muscles cells Muscles cells contain a lot of contain a lot of nucleinuclei

Tissues/ Muscle/ cardiac/ smooth

Smooth TissueSmooth Tissue

• No visible striationsNo visible striations

• Spindle shapedSpindle shaped

• Found in walls of Found in walls of hollow organshollow organs

Tissues/ Muscle/ cardiac/ skeletal

Nervous TissueNervous Tissue

• Main component of Main component of nervous systemnervous system

• The brainThe brain

• Spinal cord and Spinal cord and nervesnerves

Tissues

CreditsCredits

• Thanks to akay for Thanks to akay for images from Flickr.images from Flickr.

• Helpful information Helpful information from the textbook from the textbook and the internetand the internet

• Sound from myselfSound from myself

Tissues