Upper level: b539 Functions related to the digestive system, other specified and unspecified
Functions of maintaining appropriate body weight, including weight gain during the developmental period.
Inclusions: functions of maintenance of acceptable Body Mass Index (BMI); and impairments such as underweight, cachexia, wasting, overweight, emaciation and such as in primary and secondary obesity
Exclusions: assimilation functions (b520); general metabolic functions (b540); endocrine gland functions (b555)
Lower livel: