Respiratory system
Your respiratory system brings oxygen into your body and helps to remove carbon dioxide. Learn more about how it functions and how to keep it healthy.
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Circulatory system
The circulatory system includes the blood, heart and blood vessels. It moves oxygen and nutrients around the body and removes carbon dioxide to help keep your body cells healthy.
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Calcium
Calcium strengthens bones, helps prevent osteoporosis and more. Find out how much you need for your age and how to find good sources of calcium.
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Calcium blood test
A calcium test indicates how much calcium is in your blood. Find out how this test helps doctors diagnose or monitor and treat your illness.
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Red blood cells
Red blood cells carry oxygen around your body and transport carbon dioxide to your lungs. Learn more about how your red blood cells work.
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Calcium channel blockers (CCB)
Find out what the most common types of calcium channel blockers are used for, how they work and any side effects associated with taking them.
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Dairy foods
Dairy foods such as milk, yoghurt and cheese are rich sources of many vitamins and minerals, including calcium, which is essential to bone health.
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Parathyroid glands
Your parathyroid glands are small glands that are found in your neck and make parathyroid hormone (PTH). Find out more about PTH here.
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Parathyroidectomy
Parathyroid glands can become overactive, causing an increase in the level of calcium in your blood. Surgery to remove any affected glands is the only reliable way to prevent long-term problems.
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Blood pressure medication
Blood pressure medicines ('antihypertensives'), such as ACE inhibitors, calcium channel blockers and diuretics help manage high blood pressure.
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