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.
An HCT blood test is performed as part of a CBC, or complete blood count. Learn why the doctor orders this test and how the results help in diagnosing medical conditions. slide 1 of 6. The HCT, which stands for hematocrit, blood test measures the amount of red blood cells in a blood sample.This test is also referred to as a crit or a PCV, which means packed cell volume. The HCT blood test is usually done as part of a CBC, or complete blood count, blood test.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.