PsychoPhysiology and their functions correspond to each other. Each faculty gives rise to a specific function and each function is an expression of its corresponding faculty. It is therefore proposed to deal with each other. There are 3 faculties in the body and 3 types of functions arising from them. The faculties are

1. Nervous 2. Physical and 3. Vital

The Unani Physicians also described
Hawas - e - Khamsa Zahira - external senses
Hawas - e - Khamsa Batina - internal senses

The External senses are:

1.Quwat - e - Basira - Power of Vision
2.Quwat - e - Shamma - Power of Smell
3.Quwat - e - Sameyah - Power of Hearing
4. Quwat - e - Zayeqa - Power of Taste
5.Quwat - e - Lamesa - Power of Touch

The Internal senses are:

1. Hiss - e- Mushtarik (Faculty of Composit Sense)
2. Quwat - e - Mutasarriefa (Faculty of Modification)
a. Quwat - e - Mutafakirra (Faculty of Thinking)
b. Quwat - e - Mutakhaiela (Faculty of Imaginations)
c. Quwat - e - Wahema (Faculty of Apprehension)

The process of metabolism is completed by two factors
(a) Nutritive power and (b) Growing power.

Nutritive power is developed from the food taken in the liver and conveyed to all parts of the body. This power is served by four powers -
Attractive Power, Retentive Power, Digestive Power & Explusive Power

Growing power is responsible for the construction & growth of the human organism and served by three powers - Receptive Power, Power to retain nutrition & Assimilative Power.