The bodies of all embodied creatures are originated from earth. Their humours originate from water. Their eyes originate from light. Prana, Apana (and other vital breaths), depend on the wind. And, lastly, all unoccupied apertures within them originate from Space.
भूमेदेहो जलात् स्नेहो ज्योतिषश्चक्षुषी स्मृते। प्राणापानाश्रयो वायु: खेष्वाकाशं शरीरिणाम्॥