Each hemoglobin molecule is, in turn, a beautiful spherical structure made up of about 10,000 hydrogen, carbon, nitrogen, oxygen, and sulfur atoms, plus four heavier atoms of iron, which give blood its oxygen - carrying ability.
हरेक कोशिका में हीमोग्लोबिन के करोड़ों अणु भरे होते हैं जिनकी बनावट वाकई लाजवाब है ।