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

Explanation:

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.