Artery and vein

    
Cell types: Adipocyte (fat cell)
 

Differential diagnosis:
Blood vessels are small luminal organs and can be easily confused with appendix, ureter or small bronchi. Small bronchi have similar features as trachea and appendix has characteristic lymphatic nodules while vas deferens and ureter are highly muscular.

Diagnostic Features:
a. Tissue is compact (e.g. liver)
b. Distinct cellular vacuoles which represent areas of dissolution of fat globules due to solvents used in preparation of tissues.
c. Nucleus is flattened and peripheral.
d. Presence of connective tissue septum which alone has parallel (or wavy) collagenous fibres.
e. It is found in subcutaneous regions having fat which are then called panniculus adiposus, in mesentery, kidney, omentum, bone marrow and synovial membrane.

 

Database selection: Practical Tissue Gross

Level 1: Select  compact
Level 2: Select connective tissue from list of
sclerous, muscular, connective, organ-glands and nervous tissues since there is heterogenous collection of cells and fibres.
Level 3: Select spaces with the visibility of some thinness and spaces of tissue compactness. This will select both areolar and adipose tissues.
Level 4: Select nofibres and this will eliminate areolar tissue which has many fibres criss-crossing and parallel running..

Do you think this is a section of subcutaneous tissue or internal part of organ, or omentum or mesentery?

 

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