Appraisals and Seller Concessions ... FHA Takes Note. In the summer edition of the Federal Housing Administration (FHA) Appraiser Newsletter, the FHA re-emphasizes the importance of appraisers correctly documenting any seller concessions on a property sale.
The outer layer (tunica adventitia) consists chiefly of connective tissue and is the thickest layer of the vein. As in arteries, there are tiny vessels called vasa vasorum that supply blood to the walls of the veins and other minute vessels that carry blood away.
The tunica intima differs from the inner layer of an artery: many veins, particularly in the arms and legs, have valves to prevent backflow of blood, and the elastic membrane lining the artery is absent in the vein, which consists primarily of endothelium and scant connective tissue.