2. To focus a microscope using the high power lens you must first in low power center the specimen and make sure it is in focus. Then switch to high power and adjust using the fine adjustment or the smaller knob.
3. It prevents dust from settling on the scope and in the lenses.
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The pulmonary vein carries oxygenated blood from the lungs to the left atrium
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Is the answer to this question.
Answer:
people with eating disorders need help, they cant help themselves, its not that easy. when you have an eating disorder it messes with you whole body, if you binge and purge you have a high chance wrecking their stomach lining and their esophagus. when you starve yourself you don't just lose weight you kill cells in your body. people who have thee disorders need hell they don't realize everything they're doing to their body and its sad to see.
Explanation:
really hope this helps ;)
