<prompt> Bleeding vessel in haemorrhoids isSuperior rectal aerySuperior rectal veinMiddle rectal aeryMiddle rectal vein  <response>: Bleeding vessel in haemorrhoids is superior rectal vein which is a branch of inferior mesenteric vein at the level of rectum. Dilation of these vessels leads to bleeding leading to internal haemorrhoids. Veins are better option than aery. 