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cartilage with few collagen fibres and no elastin fibres. It reduces friction in joints, attaches bone to bone in ribcage and sternum, keeps tubes open, such as trachea and bronchi, and gives shape, such as the nose.
the clear colourless fluid that occurs in the spaces, such as the ventricles and central canal,...
rain that contains high levels of sulfuric acid, hydrochloric acid and nitric acid.
compounds that consist of any combination of elements, but do not usually contain carbon and...