False, pernicious anemia may take up to 5 years to show symptoms. However, the oxygen starts to get depleted within the first 6 months in thalassemia major.
Pernicious anemia:
In this condition, the body is unable to absorb vitamin B12 which leads to lowered amount of red blood cells which are responsible for carrying oxygen throughout the body. It is an autoimmune disease in which antibodies attack their own cells in the lining of the stomach which affects the absorption of vitamin B12. The symptoms of pernicious anemia are dizziness, fatigue, diarrhea, constipation, breathlessness, and loss of appetite. The depletion of oxygen is seen in thalassemia major within 6 months.
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Answer:
In the human body, cells are the basic units of life. Groups of cells working together for a specific function form tissues. Organs are two or more tissues operating together. Even separate organs work together, forming body systems.
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is standard procedure. It's easier to focus and locate the specimen
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view. Also it's a safety procedure. The high power objective has a
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coverslip and/or slide if the coarse adjustment is used. Most
microscopes are "bifocal", that is, in switching from low to high power,
the image is nearly in focus with minor adjustment with the fine
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