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  2. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    Below is the grading system found to be most commonly used in United States public high schools, according to the 2009 High School Transcript Study. This is the most used grading system; however, there are some schools that use an edited version of the college system, which means 89.5 or above becomes an A average, 79.5 becomes a B, and so on.

  3. Cholesterol Levels: By age, LDL, HDL, and More - Healthline

    www.healthline.com/health/high-cholesterol/...

    Recommended total cholesterol levels are under 200 milligrams per deciliter (mg/dL) for adults and under 170 mg/dL for children. Females typically need more HDL (good) cholesterol than males ...

  4. ABO blood group system - Wikipedia

    en.wikipedia.org/wiki/ABO_blood_group_system

    ABO blood group antigens present on red blood cells and IgM antibodies present in the serum. The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes (red blood cells). [1] For human blood transfusions, it is the most important of the 44 different blood type (or group ...

  5. Ankle Brachial Index Test: Why and How It's Done - Healthline

    www.healthline.com/health/ankle-brachial-index

    An ankle brachial index test, also known as an ABI test, is a procedure that can test the blood pressure in your extremities. An abnormal reading may be an indication of peripheral artery disease.

  6. Abitur - Wikipedia

    en.wikipedia.org/wiki/Abitur

    Abitur ( German: [abiˈtuːɐ̯] ), often shortened colloquially to Abi, is a qualification granted at the end of secondary education in Germany. It is conferred on students who pass their final exams at the end of ISCED 3, usually after twelve or thirteen years of schooling (see also, for Germany, Abitur after twelve years ).

  7. Ankle-Brachial Index (ABI) Test - WebMD

    www.webmd.com/heart-disease/ankle

    An ankle-brachial index (ABI) test is a simple way for your doctor to check how well your blood is flowing in your legs. Doctors use this test to check for peripheral artery disease ( PAD ). When ...

  8. Endocrine System: What Is It, Functions, Organs & Conditions

    www.healthline.com/health/the-endocrine-system

    The endocrine system is a network of glands and organs located throughout the body. It’s similar to the nervous system in that it plays a vital role in controlling and regulating many of the ...

  9. Antinuclear Antibodies (ANA) Test: Results, Positive vs ...

    www.webmd.com/a-to-z-guides/what-is-an...

    Your test is positive if it finds antinuclear antibodies in your blood. A negative result means it found none. A positive test doesn’t mean that you have an autoimmune condition. Between 3% and ...