In hatha yoga, mudras are used in conjunction with pranayama (yogic breathing exercises), generally while in a seated posture, to stimulate different parts of the body involved with breathing and to affect the flow of prana, bindu (male psycho-sexual energy), boddhicitta, amrita or consciousness in the body. Unlike older tantric mudras, hatha yogic mudras are generally internal actions, involving the pelvic floor, diaphragm, throat, eyes, tongue, anus, genitals, abdomen, and other parts of the body. Examples of this diversity of mudras are Mula Bandha, Mahamudra, Viparita Karani, Khecarī mudrā, and Vajroli mudra. These expanded in number from 3 in the "Amritasiddhi", to 25 in the "Gheranda Samhita", with a classical set of ten arising in the "Hatha Yoga Pradipika".