व्यान उदानः समानोऽन इत्येतत्सर्वं प्राण एवैतन्मयो वा अयमात्मा वाङ्मयो मनोमयः प्राणमयः ॥ ३ ॥
In plain words
Vyāna, udāna, samāna, and ana—all of this is simply prāṇa. The self is made of speech, made of mind, and made of breath.
Close to the Sanskrit
Vyāna, udāna, samāna, and ana—all this is prāṇa alone; constituted by this, this self is made of speech, made of mind, made of prāṇa.