The continent can be broken into four major landform regions: the Coastal Plains, the Eastern Highlands, the Central Lowlands and the Western Plateau. These landform regions have been created by movements in the Earth's crust, river erosion and changes in climate and sea level.
Causes of Low HGB and Low HCT. Figuring out hematocrit levels in the blood is done through Mean Corpuscular Volume or MCV and Red Cell Distribution Width or RDW. These tests determine whether someone is suffering from low Hgb and/or low HCT levels in their blood and can help doctors determine a cause. 1.Anemia is the direct result of a low red blood cell count.iguring out hematocrit levels in the blood is done through Mean Corpuscular Volume or MCV and Red Cell Distribution Width or RDW. These tests determine whether someone is suffering from low Hgb and/or low HCT levels in their blood and can help doctors determine a cause.
The blood sample for a hematocrit blood test is drawn from a vein, usually in the arm, and collected into a vacuum tube. An alternative method of collection is a finger-stick, or heel-stick in newborns. This method requires that less blood and the sample is collected in a tiny tube called a pipette.nemia is the most common cause of a low hematocrit result. Anemia occurs when the body has a below normal amount of red blood cells. This causes a hematocrit levels fall below normal. Malnutrition or nutritional deficiencies of certain vitamins or minerals can lead to anemia and produce low HCT blood test results.