This chapter is about the functions of ingestion, digestion and elimination, as well as functions involved in metabolism and the endocrine glands.
Lower livel:
b539 Functions related to the digestive system, other specified and unspecified
b559 Functions related to metabolism and the endocrine system, other specified and unspecified
b598 Functions of the digestive, metabolic and endocrine systems, other specified
b599 Functions of the digestive, metabolic and endocrine systems, unspecified 88