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OCR A Level Biology The Liver Exam And Answers Graded A+ 2024.

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What is excretion? - Answer The removal of metabolic waste from the body What are the 3 main metabolic waste products of the body? - Answer 1. Carbon Dioxide 2. Bile Pigments 3. Urea What blood vessel brings oxygenated blood to the liver? - Answer Hepatic artery What does the hepatic portal vein do? - Answer Brings deoxygenated blood, rich in digested nutrients, from the small intestine to the liver What does the hepatic vein do? - Answer Takes deoxygenated blood away from the liver and joins the vena cava What is a lobule? - Answer Many vertical rows of hepatocytes arranged around a central vein Where in the body would you find a hepatocyte? - Answer The liver What are sinusoids? - Answer Capillaries which run along liver lobules Branches of which two vessels provide blood to the sinusoids? - Answer Hepatic artery and hepatic portal vein What are canaliculi? - Answer Fine ducts which carry bile from hepatocytes to the main bile duct In which direction do canaliculi run? - Answer The opposite direction to sinusoids

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