called lumen
The central opening of a vessel is called the lumen. It is the hollow space within the vessel that allows for the passage of fluids, such as blood in blood vessels or sap in plant vessels.
The lumen is the space within the blood vessel (or within any tubular structure).
Diapedesis
Lumen
basilar artery.
The intima
The lumen is the space within the blood vessel (or within any tubular structure).
The lumen is the inner open space or cavity of a tubular organ, such as a blood vessel or an intestine
Lumen refers to the inner space within a tubular structure such as a blood vessel or intestine, through which substances pass. It is not a measure of size like red blood cells but rather the open space within the structure. Red blood cells are typically around 6-8 micrometers in diameter, much larger than the lumen of small blood vessels.
The tubular cavity within the body is called a lumen. It refers to the inner space of a tubular structure such as a blood vessel or intestine. The lumen allows for the passage of gases, liquids, or other substances within the body.
Blood accumulates in the subarachnoid space, which is the area between the arachnoid membrane and the pia mater in the brain and spinal cord. Subarachnoid hemorrhage can occur due to the rupture of a blood vessel in this space, leading to bleeding and accumulation of blood that can cause serious neurological complications.
by dilating the blood vessel with the introduction of larger and larger stiff catheters through the narrowed space. The complications that resulted from this approach led researchers to develop ways to open the vessel with smaller devices