Final answer:
Hematocrit levels above 65% and below 10% can cause different health issues. An elevated hematocrit can lead to increased blood viscosity, making it harder for the heart to pump blood throughout the body. Hematocrit levels below 10% indicate severe anemia, which can result in fatigue and increased risk of infections.
Step-by-step explanation:
Hematocrit levels above 65% and below 10% can cause different health issues. An elevated hematocrit, known as polycythemia, can be caused by conditions such as dehydration or living at high altitudes. This can lead to increased blood viscosity, making it harder for the heart to pump blood throughout the body. On the other hand, hematocrit levels below 10% indicate severe anemia, which can result in fatigue, shortness of breath, and increased risk of infections.