Extravasate means to leak out side of a blood vessel.
Hematricit
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.)
angiographic
Angionecrosis
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