Twelve bulls have been used, when they had average live weight of 257kg, being four zebu and eight dairy crossbreeds (four crossbreeds Holstein x Gir and four Holstein x Guzera). They have been weighted and distributed into two treatments (zebu and dairy crossbreeds), in phase growing. The animals were studied up to 340kg of live weight. Grass hay Tifton 85 (Cynodon dactylon) have been used as feedstuff. After slaughtering samples of rumen, reticulum, omasum, abomasum and intestines have been collected after emptying and cleaning. Weight and samples values of blood, leather, feet, head, liver, kidneys, lung, tongue, spleen and internal fat (mesenterium plus perirenal and pericardia fats) have been collected. Empty body weight (EBW) have been obtained by summing weights of carcass, blood, leather, feet, tail, intestines and organs. The leather and group head-foot-leather of zebu bulls have been heaver than in dairy crossbreeds. Zebu bulls, kidneys, spleen, heart and tongue have smaller than in dairy crossbreeds. Group rumen-reticulum-omasum-abomasum and levels of mesenterium and internal fat have not presented differences among racial groups.
carcass; leather; mesenterium fat
