LAB #4 & 5:HISTOLOGYThe Microscopic Study of TissuesBIOL 341LAB (2019-2020)DrDeenaAbabneh
LAB OBJECTIVES•Give the defining characteristics of each of the four majortissue types.•Describe the appearance and differences among thetypes of epithelial tissues.•Describe the appearance and differences among thetypes of connective tissues.•Identify the three types of muscular tissue and describethe differences among them.•Identify the parts of neurons and supporting cellsdescribed in this lab.•State the location of these tissues what is their function.
TISSUESCells work together in functionally related groups calledtissuesTypes of tissues:1.Epithelial–lining and covering2.Connective–support3.Muscle–movement4.Nervous–control
CONNECTIVE TISSUEMost diverse and abundant tissueMain classes•Loose and dense–Fibrous connective tissue•Blood and lymph–Fluid connective tissue•Cartilage and Bone tissue–Supporting connectivetissuesCommon components of connective tissue:•Specialized Cells•Matrix•Protein fibers•Ground substanceVary according to tissue
Loose Connective tissueAdipose tissueBloodBoneCartilage (hyaline cartilage)Types Of Connective Tissue(viewed in lab)
LOOSE CONNECTIVE TISSUEDescription•Secilaized cells–fibroblasts•All three fibers are present for support i.e. collagen,reticular, elastic fibers•Highly vascular tissueFunctionWraps and cushions organs•Location–Widely distributed underepithelia–covers organs and bloodvessels
ADIPOSE TISSUEDescription•Cells: closely packed adipocytes•Have nucleus pushed to oneside by fat droplet•Function•Provides fuel•Insulates against heat loss•Supports and protects organsLocation•Under skin•Around kidneys•Behind eyeballs, withinabdomen and in breasts