First choice.
You can refer to any bio book to simply give you a brief summary for what each organ do and what juices each organ produce to digest what specific typr of material in your food.
do all bacterial cells have the same structures? no
A molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.
From the food they intake in different ways such as Plants or other animals such as insects which are their fuel