Indian Ayurveda . . . . . .
Samdoshah Samagnishcha Samdhatu Malakriyah
Prasannatmendriyamanah Swastha Ityabhidheeyate
"Swasthyas Swasthya Rakshanam ..
.. Aturasya Vikar Prashamanamcha"
Such a knowledge of life is no where else in the world.

It is Ayurveda, which can always point out the Definite Prognosis of Diseases

(Sadhya-asadhatyva).

Ayurveda is based on
3 Doshas, 3 Malas, 7 Dhatus, Agni  and Mana.

3 Dosha = Vata, Pitta , Kapha.   
3 Mala   = Purish, Mutra, Swed
7 Dhatu  = Rasa, Rakta, Mamsa, Meda, Asthi, Majja, Shukra
13 Agni  = Panchabhutagnis, Dhatvagnis, Jatharagni
Mana    = Satva, Raja, Tama.
When the "Samavay" relation is broken, there is no life. So, the Samavay Sambandh is more important because it can count the time in a second to 100 years.

Previously, in the ancient days, the people used to be living more, but with the effect of more and more restrictions, the continuity of the life became gradually shorter.
Ayurveda .............

Ayurveda is a Sanskrit term, made up of the words "ayus" and "veda." "Ayus" means life and "Veda" means knowledge or science. The term "ayurveda" thus means 'the knowledge of life'
SHREE SHANKAR PRASNNA