How many body systems are outlined in the "review of symptoms?"?

There are 14 body systems recognized by the ROS. These systems are listet as follows:

1 - Constitutional symptoms

2 - The eyes

3 - The ears, the nose, the mouth and the throat

4 - The Cardiovascular system

5 - The Respiratory system

6 - The Gastrointestinal system

7 - The Genitourinary system

8 - The Musculoskeletal system

9 - The Integumentary/Breast system

10 - The Neurological system

11 - The Psychiatric system

12 - The Endocrine system

13 - The Hematologic/lymphatic system

14 - The Allergic/immunologic system