Yogic dhyana commences with pranayama. Pranayama to samadhi is a single continuous process.
Prana kriya touches 350 nadis (channels) within.
Pranayama regulates breath by desha (region), kala (duration), samkhya (cycles).
Breath driven to touch pranic manas (mind), loosen grip of mental vasanas (tendencies).
Asanas teach pranayama fundamentals—breath uses, applications, processes.