MCHC and MCV, or mean corpuscular volume, levels are both used to test a person for anemia. MCHC tests for the levels of hemoglobin in the blood. This test is also referred to as an MCH test.
Civilization first developed in the Indus River valley in present-day Pakistan in the middle of the 3d millennium B.C., more than a thousand years earlier than it did in China. In fact, the civilization of the Indus valley, usually called Harappan after its chief city, rivals Sumer and Egypt as humanity's oldest. But like Sumer and its successor civilizations in the Middle East, Harappan civilization was unable to survive natural catastrophes and nomadic invasions.
Smaller civilizations arose in Elam in modern-day Iran, and on the island of Crete in the Aegean Sea, as well as the Olmec civilization and the Caral civilization in modern-day Mexico and Peru. The Mesopotamian civilization of Sumer is officially is believed to have begun around 4000-3500 BC. It ended at 2334 BC with the rise of Akkad, and is the world's first civilization. The Egyptian civilization of the Nile Valley started at around 3200 BC. It ended at around 343 BC, at the start of the Achaemenid dynasty's control of Egypt. This is one of the three oldest civilizations in the world.