Do You Know?

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• Most people breathe about 16 times per minute.
  
  - More then 40 of compounds in tobacco smoke have showm to cause cancer
  
  - Haemophilia is inherited disease in which the blood does not clot

- Anyone can donate blood but they must :
- be generally healthy be between 18 and 65 years old
- weigh at least 45 kg
- have a heamoglobin level of at least 1.5 mg per litre ( males ) or 1. mg per litre ( females )

- Our kidneys filter about one litre of blood per minute...

- An ostrich egg can weigh about kg or more..

- The word 'menstruation' comes from the latin word menstrua which means month

- An adult human has a 2.5 kg brain....