what is hepatic caecae and where is it located?what are its functions?

The junction of mid gut and hindgut (part of alimentary canal) of crustaceans such as coakroach bears 7-8 blind tubes called hepatic caecae that are present at its anterior end. They are lined by glandular cells which secrete various digestive enzymes like peptidases, trypsin etc. So these caeca helps in digestion of proteins, starch, fats etc.