Features. A parcel number may contain all or part of the real estate's tax account number with the local property taxing authorities. The numbers represent the physical location of the property, such as town, county and street, on the maps the assessor uses for property tax purposes.
1 Cancer. 2  If cancer cells block lymphatic vessels, lymphedema may result. 3  For instance, a tumor growing near a lymph node or lymph vessel could enlarge enough to block the flow of the lymph fluid. 4  Infection. 5  An infection of the lymph nodes or parasites can restrict the flow of lymph fluid.
Lymphatic vessels contain one-way valves to prevent the back flow of lymphatic fluid. The lymph capillaries drain the lymph to larger contractile lymphatics, which have valves as well as smooth muscle walls. These are called the collecting lymphatics. It is interesting to know that unlike blood circulatory system, your lymphatic system does not possess any pumping organ for the movement of lymph through its network of channels. Tiny one way valves push the lymph from node to node.