MediHealth

  • Abdomen
    Updated: Feb 03, 2010 - 15:11

    Your abdomen is the part of your body between your chest and pelvis. Inside it are lots of organs - your stomach, small intestine, large intestine (colon), liver, spleen, pancreas, kidneys, appendix, gallbladder, bladder and your adrenal glands. These are all held in place by something called you...

  • Acute
    Updated: Nov 17, 2009 - 13:03

    An illness is acute if it comes on suddenly or doesn't last for very long, or both! The opposite of an acute illness is a chronic illness. ...

  • ADHD
    Updated: Nov 26, 2009 - 17:36

    ADHD is caused by a problem with the neurons in the frontal lobe of your brain. The full name of ADHD is attention deficit hyperactivity disorder. ‘Deficit’ means short, and ‘hyper’ means high; so, if you have ADHD you have a short attention span and you are highly active. It starts when you ...

  • Adrenal gland
    Updated: Nov 17, 2009 - 13:03

    Your adrenal glands are two small, but very important, glands that sit above your kidneys. They make several hormones that help your body to work properly. The inner part of each adrenal gland makes two hormones that help you to cope with stressful situations, like being frightened. These hormone...

  • Adrenaline
    Updated: Nov 17, 2009 - 13:03

    Adrenaline (also called epinephrine) is a hormone. If you have a serious allergic reaction, you may be given an injection of adrenaline to treat it. ...

  • Aldosterone test
    Updated: Feb 02, 2010 - 14:49

    An aldosterone test is a blood test that checks for the levels of a hormone called aldosterone. Aldosterone’s job is to make your blood pressure higher. Your doctor will use an aldosterone test to find out why you might have low or high blood pressure and how to treat.

  • Allergen
    Updated: Nov 17, 2009 - 13:03

    Allergens are substances found in foods, plants and animals or in the air. If your immune system overreacts to them, they cause allergic reactions. If you have asthma and/or eczema, certain allergens trigger your illness. Common allergens include grass, flower and tree pollen, particles from th...

  • Allergic reaction
    Updated: Feb 22, 2010 - 10:53

    An allergic reaction happens when your immune system thinks that something harmless, like a peanut, is a germ and overreacts trying to fight it. This can make you feel very unwell and be very dangerous. If you have an allergy to something, your body will start an allergic reaction if you come in...

  • Alveoli
    Updated: Nov 17, 2009 - 13:03

    Alveoli (one is called an alveolus) are little bubbles found at the end of your bronchioles and there are over 600 million of them! Carbon dioxide is carried through your blood from the rest of your body to the alveoli, where it is released. In return, your blood takes oxygen from the blood vesse...

  • Amblyopia
    Updated: Nov 17, 2009 - 13:03

    Amblyopia, also called lazy eye, means that you can’t see properly with one of your eyes. It is caused by lack of use of the eye when you are very young. You get it when your eyesight is still developing, and although it usually only affects one eye, very rarely it can affect both. ...

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