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| − | ===Acinus===
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| − | *the smallest functional unit of the [[Liver - Anatomy & Physiology|liver]] - this unit stresses the dependence of the [[Liver - Anatomy & Physiology|liver]] on its afferent blood vessels and efferent bile ducts
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| − | *a roughly diamond shaped parenchymal mass surrounding and supplied by the portal area
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| − | *consists of 3 zones:
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| − | **Zone 1 - periportal (centroacinar), around the portal areas
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| − | **Zone 2 - midzonal
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| − | **Zone 3 - centrilobular (periacinar), bordering the hepatic venules
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| − | NB: blood enters from Zone 1 to Zone 3 and thus becomes less and less oxygenated
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| − | (image needed - great one from thomson's, pg 82)
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