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 main concern about a low resting heart rate (assuming an otherwise normal heartbeat) is that your heart isnât pumping out enough blood to your body, particularly to your brain. And the main signs that your brain is not getting an adequate amount of blood are feelings of faintness, light-headness or dizziness. So if your resting heart rate is less than 60 but you donât have any of these symptoms, then the likelihood of your low heart rate signifying a problem is very low.