The lumen is the inner open space or cavity of a tubular organ, such as a blood vessel or an intestine
Nicotine is the blood vessels' constrictor. Not all blood vessels, of course, but mainly the peripheral blood vessels, including the brain capillary blood vessels.
The blood vessels in a chicken leg are found on the back of the chicken skin, really easy to tell when the chicken is raw. They are thin, small red lines all over the skin.
Endothelium, which is the innermost layer of all blood vessels.
All organs have blood vessels as they all need a supply of blood to be viable
so all ur blood can get nutrients and oxygen.
Of course they do.
Aids is present in the blood - the blood circulates through the blood vessels and therefore, yes, it is found in the main blood vessels (and all other blood vessels).
there is not a certain kind of vessel; all the vessels stretch.
to carry blood all parts of the body
The heart pushes blood through all the blood vessels in the body.
a blood vessels transport blood to all parts of the body
As you grow, your blood vessels do as well. This is why only an adult human body's blood vessels, when all connected, can reach halfway to the moon, whereas a child's would not. These blood vessels also stretch when you grow or flex.