But they are so small that you would need a microscope to examine one! — See the diagram of a nephron, greatly enlarged, on page 25. Two - Stage Filtration of Your Blood
आपकी रक्‍त - धारा में पाई जानेवाली रक्‍त - कोशिकाएँ और प्रोटीन बहुत ज़रूरी हैं ।