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cardiovascular system, blood vessels, lymphatic system, NODE, composition…

- - - - diffusion
- - - - to keep heat in
- - - - to release heat
- - - - plasma becomes tissue fluid to collect waste products, excess water and toxins
        
        90% of fluid gets passed back into blood, 10% is left behind known as lymph
        
        lymph fluid drains into lymph vessels and travels to lymph nodes
        
        lymph nodes filter lymph fluid (contain white blood cells- lymphocytes)
        
        stops diseases being fed back into blood flow
        
        broken down diseases then get fed with the lymph fluid through larder lymph vessels up to neck
        
        1 more item...
- - - - blood through tricuspid valve (atrial systole)
        
        LUB sound when valve shuts
  - - - signal sent to BOH and PF
  - - - DUB sound when valve shuts