ANIMAL TISSUE - Career Point

CAREER POINT .TRANSITIONAL EPITHELIUM (UROTHELIUM)– It is only tissue in which basement membrane is absent. So innermost layer directly rest upon underlayingconnective tissue.– In this epithelium 4-6 layer of cells are present.– Inner most layer of cells is composed of cube like cells.– Middle 2-4 layers are composed of pear shaped or umbrella shaped cells.– Outermost 1 or 2 layers are of oval shaped cells.– These different shape of cells appears only in resting stage. When this tissue is stretched, all the cellbecome flattened.– At outermost layer a thin cuticle is present which makes this tissue water proof.– Cells are interconnected by interdigitation.Eg. – Renal Pelvis– Ureter– Urinary Bladder– Proximal part of male urethra.STRATIFIED EPITHELIUM– Stratified epithelium possess many layer of epithelial cells, the deepest layers is made up of cuboidalcells.On the basis of shape of the cells of outermost layer it is of four types.(1) Stratified squamous epithelium(2) Stratified cubical epithelium(3) Stratified columnar epithelium(4) Stratified ciliated columnar epitheliumSTRATIFIED SQUAMOUS EPITHELIUM– Innermost layer of cells are of cuboidal or columnar shaped.– These cells have high Mitotic indexCorporate Office: CP Tower, IPIA, Road No.1, Kota (Raj.), Ph: 0744-3040000 (6 lines) ANIMAL TISSUE 9