Extravasate means to leak out side of a blood vessel.
Extraoral is the medical term meaning outside the mouth.
Phlebitis is the medical term meaning inflammation of a blood vessel. (Thrombophlebitis is the medical term meaning inflammation of a blood vessel with a clot.)
Angionecrosis
angiographic
Avascular is the medical term meaning without blood vessels.
telangiectasia
Angiolith
IntimaEndothelium
The lumen is the space within the blood vessel (or within any tubular structure).
Thrombectomy
Vasoconstriction is the normal narrowing of a blood vessel.
Ischemia