Within the Sri Yantra, there are actually 24 lotus petals arranged in two concentric circles. The outer circle contains 16 petals, which signify the lotus of development as well as fulfillment of all hopes, wishes and aspirations. Hatha and Tantra yogas have developed a rich description with the anatomy in https://sethtybcd.blogofchange.com/40080157/little-known-facts-about-beej-mantra