5.2.1 Draw and label a diagram of the carbon cycle to show the processes involved. 5.2.2 Analyse the changes in concentration of atmospheric carbon dioxide using historical records. 5.2.3 Explain the relationship between rises in concentrations of atmospheric carbon dioxide, methane and oxides of nitrogen and the enhanced greenhouse effect.
Choledochal cysts are congenital conditions associated with benign cystic dilatation of bile ducts. They are uncommon in western countries but not as rare in East Asian nations like Japan and China.
choledochal cyst The uncommon congenital cystic dilation of the common bile duct, which is often associated with cystic dilation of the intrahepatic biliary tract. It is more common in females (3â4:1), especially in Asians; most present in infancy.