The statement "he will cut away all this" can be placed at the beginning of the sentence. AT: "He will cut away the fat that covers the inner parts ... with the kidneys"
# inner parts
This is the stomach and intestines.
# by the loins
This is the part of the body on the sides of the backbone between the ribs and hipbone.
# the lobe of the liver
This is the curved or rounded part of the liver. This is considered the best part of the liver to eat. AT: "the best part of the liver"