Veins generally carry deoxygenated blood, and veins push blood toward the heart. Given these facts, what is carried toward the heart among the following options:
- flow of electrons
 - kinetic energy
 - deoxygenated blood
 - the body's largest organ
 - Electrical energy
 - energy of moving objects
 - refraction of light
 - electromagnetic energy


 

   deoxygenated blood      