The aorta is the blood vessel with the widest lumen. In contrast, capillaries are the blood vessels with the narrowest lumen.
Lumen
called lumen
The lumen is the space within the blood vessel (or within any tubular structure).
Lumen
lumen?
The lumen is the inner open space or cavity of a tubular organ, such as a blood vessel or an intestine
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.
lumen
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 lumen
The lumen is the space within the blood vessel (or within any tubular structure).
endothelium