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Copyright © 2009 Pearson Educa8on, Inc., publishing as Pearson Benjamin Cummings Four Types of Tissues • Tissues are collec8ons of cells and cell products that perform specific, limited func8ons • Four Types of 8ssue – Epithelial *ssue • Covers exposed surfaces • Lines internal passageways • Forms glands

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Page 1: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

FourTypesofTissues•  Tissuesarecollec8onsofcellsandcellproductsthatperformspecific,limited

func8ons

•  FourTypesof8ssue– Epithelial*ssue

•  Coversexposedsurfaces•  Linesinternalpassageways•  Formsglands

Page 2: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

FourTypesofTissues•  FourTypesofTissue(cont’d)

–  Connec*ve*ssue•  Fillsinternalspaces•  Supportsother8ssues•  Transportsmaterials

•  Storesenergy

– Muscle*ssue•  Specializedforcontrac8on•  Skeletalmuscle,cardiacmuscle,&smoothmuscle

–  Neural*ssue•  Carrieselectricalsignalsfromonepartofthebodytoanother

Page 3: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues

•  Epithelia– Layersofcellscoveringinternalorexternalsurfaces

•  Glands– Structuresthatproducesecre8ons

Page 4: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues

•  Characteris*csofEpithelia– Cellularity(celljunc8ons)

– Polarity(apicalandbasalsurfaces)

– AQachment(basallamina)

– Avascularity

– Regenera8on

Page 5: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues

Figure4–1ThePolarityofEpithelialCells.

Page 6: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues

•  Func*onsofEpithelialTissue– Providephysicalprotec8on

– Controlpermeability

– Providesensa8on

– Producespecializedsecre8ons(glandularepithelium)

Page 7: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues

•  MaintainingtheIntegrityofEpithelia

–  Intercellularconnec8ons

– AQachmenttobasallamina

– Epithelialmaintenanceandrepair

Page 8: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues

•  IntercellularConnec8ons–  Celljunc8ons

•  Formbondswithothercellsorextracellularmaterial:

–  Tightjunc*ons

–  Gapjunc*ons

Page 9: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

EpithelialTissues

•  CellJunc8ons– Tightjunc8ons—betweentwoplasmamembranes

•  Preventspassageofwaterandsolutes•  Isolateswastesinthelumen

– Gapjunc8ons—allowrapidcommunica8on•  Heldtogetherbychannelproteins•  Allowionstopass

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Page 10: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues•  CellJunc8ons– Desmosomes

• Actasintercellularcement

•  Spotdesmosomes– 8ecellstogether– allowbendingandtwis8ng

Page 11: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

EpithelialTissues

•  EpithelialMaintenanceandRepair

– Epitheliaarereplacedbydivisionofstemcells

– Nearbasallamina

Page 12: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia•  Singularepithelium;pluralepithelia

•  ClassesofEpithelia–  Basedonshape

•  Squamousepithelia:thinandflat

•  Cuboidalepithelia:squareshaped•  Columnarepithelia:tall,slenderrectangles

–  Basedonlayers•  Simpleepithelium:singlelayerofcells

•  Stra8fiedepithelium:severallayersofcells

Page 13: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Page 14: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Page 15: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–3SquamousEpithelia.

Page 16: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–3SquamousEpithelia.

Page 17: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–4CuboidalEpithelia.

Page 18: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–4CuboidalEpithelia.

Page 19: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–4CuboidalEpithelia.

Page 20: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–5ColumnarEpithelia.

Page 21: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–5ColumnarEpithelia.

Page 22: Four Types of Tissues - BioRocks-2ttbiorocks-2.weebly.com/.../4/...types_of_tissues__epithelial_tissues.pdf · Four Types of Tissues • Four Types of Tissue (cont’d) – Connecve

Copyright©2009PearsonEduca8on,Inc.,publishingasPearsonBenjaminCummings

Classifica8onofEpithelia

Figure4–5ColumnarEpithelia.


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