In the circulatory system, a<unk>  is a blood<unk> essel that carries blood toward the heart. The majority of<unk> s in the body carry low-oxygen blood from the tissues back to the heart; the exceptions being the pulmonary and umbilical<unk> s which both carry oxygenated blood.
Vein
Bite
Iodoform
Wart
Nylon
Cineole
Hydrocarbon
Oxamyl