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- Circulatory system
The heart, blood and blood vessels work together to service the cells of the body.
- Blood transfusion
Donated blood is screened for blood-borne diseases such as hepatitis, syphilis and HIV.
- Chilblains
The symptoms of chilblains are made worse with sudden temperature changes.
- Aneurysm
An aneurysm may have no symptoms until it is either very large or it ruptures.
- Blood groups
A person's blood group is determined by a pair of genes, one each inherited from their mother and father.
- Blood and blood vessels
Information about bleeding, blood pressure, conditions, risks and blood products.
- White tailed spider
In most cases, the bite from a white tailed spider only causes a mild reaction, including itching and skin discolouration.
- Smallpox
Smallpox was once a feared and highly contagious viral disease.
- Smoking - effects on your body
Along with nicotine, people who smoke inhale about 7,000 other chemicals in cigarette smoke. Many of these chemicals come from burning tobacco leaf. Some of these compounds are chemically active and trigger profound and damaging changes in the body.
- Fainting
Common causes of fainting include heat, pain, distress, the sight of blood, anxiety and hyperventilating.