<prompt> Blood supply of spinal cord is through -Anterior spinal arteryVertebral arteryDeep cervical arteryAll of the above  <response>: Ans. is d i.e., All of the aboveArteryBranch ofTerritory of supply1. Anterior spinal artery 1 in number4th part of vertebral arteryVentral 23rd cross section of spinal cord2. Posterior spinal arteries 2 in number4th part of vertebral artery, sometimes from posterior inferior cerebellar arteryPosterior l3rd of the cross-section of spinal cord3. Segmental spinal branchesa Vertebral artery 2nd partb Deep cervical arteryc Ascending cervical arteryd Posterior intercostal arteriese Lumbar arteries Subclavian artery Costocervical trunk of 2nd part of subclavian Branch of thyrocervical trunk Thoracic aorta Abdominal aorta a, b and c supply the cervical segments and uppermost thoracic segments up to T2 d and e supply rest of the cord 