Blood Suppl1 - Digestive System Blood Supply The liver...

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Digestive System Blood Supply The liver receives blood from two sources * Hepatic artery- provides oxygenated blood. * Hepatic portal vein- receives deoxygenated blood containing newly absorbed nutrients. Bile * A yellow,brownish, or olive-green liquid secreted by the hepatocytes. * It has a pH of 7.6-8.6 * It consist of mostly water and bile salts, cholesterol, phospholipids (lecithin), bile pigments and several ions. * It is stored in the gallbladder. Bile * It is an excretory product with a digestive function. * bile salts aid in the digestion of fats * Bile salts aid in emulsification of fats (the conversion of fat globules into a suspension of fat droplets), allowing enzymes greater surface area from which they can chemically digest fat. Bile * The principal bile pigment is bilirubin (a breakdown product of red blood cells. * is broken down in the intestine to stercobilin which gives feces its color. Regulation of Bile Secretion * Bile secretion is determined by both nervous and hormonal factors.
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