Each hemoglobin molecule is made of four subunits, each containing a heme group that can bind one molecule of oxygen. Therefore, one molecule of hemoglobin can bind four molecules of oxygen. Oxyhemoglobin is hemoglobin bound by oxygen, and it gives oxygen-rich blood a red color.ach hemoglobin molecule is made of four subunits, each containing a heme group that can bind one molecule of oxygen. Therefore, one molecule of hemoglobin can bind four molecules of oxygen. Oxyhemoglobin is hemoglobin bound by oxygen, and it gives oxygen-rich blood a red color.
Hitler referred to Germany under his regime as the Third Reich. He wanted to create a new government that would rule Europe for 1000 years.  The Axis was the alliance of 3 countries, Germany, Italy and Japan, that fought against the Allies. Other countries also joined or were forced to join the Axis.
The term derives from the Germanic word meaning realm in general, but is typically used in German to designate a kingdom or an empire, especially the Roman Empire. The terms Kaisertum and Kaiserreich are used in German to more specifically define an empire led by an emperor. Reich is comparable in meaning and development (as well as descending from the same Proto-Indo-European root) to the English word realm (via French reaume kingdom from Latin regalis royal).