Surfaces of rumen ( Grooves and pillars )

Https://www.youtube.com/watch?v=eA8n1Q7olvk 1 Ruminoreticula groove  2 left longitudinal groove and pillar 3 right longitudinal groove and pillar  (Right longitudinal groove with the right accessory groove surrounds an elongated bulge named insula ruminis) 4 left accessory groove and pillar  5 right accessory groove and pillar   6 cranial transverse groove and pillar  7 caudal transverse groove and pillar 8 left dorsal coronary groove and pillar 9 right dorsal coronary groove and pillar  10 left and right ventral groove and pillar ( left and right ventral coronary grooves divide the caudal part into 2 blind sacs)