Mbh 12.329.4b

The body is furnished with the senses are dominated over by the Sadhyas and many great beings of mighty strength. These gave birth to an invincible son named Samana. From Samana sprang a son called Udana. From Udana sprang Vyana arose Apana, and lastly from Apana sprung the wind called Prana. That invincible scorcher of all foes, viz., Prana, became childless. I shall now recite to thee the different functions of those winds. The wind is the cause of the different functions of all living creatures, and because living creatures are enabled to live by it, therefore is the wind called Prana (or life). That wind which is the first in the above enumeration and which is known by the name of Pravaha (Samana) urges, along the first course, masses of clouds born of smoke and heat. Coursing through the welkin, and coming into contact with the water contained in the clouds, that wind displays itself in effulgence among the darts of lightning.[1753] The second wind called Avaha blows with a loud noise. It is this wind that causes Soma and the other luminaries to rise and appear. Within the body (which is a microcosm of the universe) that wind is called Udana by the wise. That wind which sucks up water from the four oceans, and having sucked it up imparts it to the clouds in the welkin, and which, having imparted it to the clouds present them to the deity of rain, is third in the enumeration and known by the name of Udvaha. That wind which supports the clouds and divided them into diverse portions, which melts them for pouring rain and once more solidifies them, which is perceived as the sound of the roaring clouds, which exists for the preservation of the world by itself assuming the form of the clouds, which bears the cars of all celestial beings along the sky, is known by the name of Samvaha. The fourth in the enumeration, it is endued with great strength so that it is capable of ending the very mountains. The fifth wind is fraught with great force and speed.