The liver
- Created by: Steff06
- Created on: 09-03-16 09:40
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- The liver
- The liver produces important chemicals and BILE.
- The liver breaks down TOXINS and old ERYTHROCYTES.
- HEPATOCYTES (liver cells) carry out metabolic processes and the liver has an important role in HOMEOSTASIS.
- The liver is supplied with blood from 2 sources.
- OXYGENATED blood from the HEART.
- Blood travels from AORTA via the HEPATIC ARTERY into the liver. Supplies OXYGEN essential for AEROBIC RESPIRATION.
- DEOXYGENATED blood from the DIGESTIVE SYSTEM.
- Enters liver via the HEPATIC PORTAL VEIN.
- OXYGENATED blood from the HEART.
- Blood LEAVES the liver via the HEPATIC VEIN and rejoins the VENA CAVA.
- BILE DUCT that carries bile from liver to the GALL BLADDER where it is stored until required to aid digestion of fats.
- Liver is divided into LOBES which are further divided into CYLINDRICAL LOBULES.
- Each lobule contains VERTICAL ROWS of HEPATOCYTES arranged around a central blood vessel called the CENTRAL VEIN.
- BRANCHES of the HEPATIC ARTERY and HEPATIC PORTAL VEIN supply blood to the CAPILLARIES in chambers called SINUSOIDS of each LOBULE.
- Running BETWEEN the lobules in the opposite direction to the blood are CANALICULI (fine DUCTS) carrying BILE from the liver cells towards the man bile duct.
- LOBULES: Each is a 6-sided structure consisting of specialised EPITHELIAL cells called HEPATOCYTES. Lobules arranged in IRREGULAR, branching interconnected plates around the CENTRAL VEIN.
- Hepatocytes have a simple cuboidal shape with many MICROVILLI.
- The liver produces important chemicals and BILE.
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