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Hose blockage, core blockage, disconnected heat valve.
Poor water pressure is the term used to describe the lack of water flow. It is often caused by a partial blockage in the pipe.
If there is a blockage of the ventricular system the flow of CSF is interrupted
Death.
There is a slight blockage somewhere in your waste drainage system
could be a lack of pressure, or a lime blockage in the seat of the valve, turn water off to valve, remove the stem, turn water on then back off, this might clear any blockage,
Gutter screens will help to keep your gutters clean. When leaves and other debris build up in your gutters it will stop the flow of water leaving your gutter system useless. With gutter screens there will not be such a blockage and the water will flow freely.
The Carotid artery
No river flows through Vienna, Belgrade and Portugal. The Danube does flow through Vienna and Belgrade, but not through Portugal.
pulmonary embolism
It could stop the flow and cause a blockage. It may also allow to much flow through.
Necrosis is tissue death, and infarct means a blockage of blood flow to tissues, so it sounds like someone is describing tissue death that appears to be due to blockage of blood flow.