why does the blood flows from intestine is not directly to posterior vena cava
Answers
The veins starting from the stomach and intestine do not directly convey the blood to the posterior vena cava. Instead, they first enter the liver as a combined hepatic portal vein. The liver acts as a storehouse to regulate the number of nutrients flowing into the general blood circulation. The liver performs many functions some of which are gluconeogenesis, glycogenolysis and detoxification. Gluconeogenesis is the conversion of excess sugar (that are absorbed from the intestinal wall) into glycogen with the help of insulin hormone. Glycogenolysis is the conversion of glycogen into glucose. The liver cells detoxify any toxic molecules that are absorbed into the body through food.
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Answer:
The veins starting from the stomach and intestine do not directly convey the blood to the posterior vena cava. Instead, they first enter the liver as a combined hepatic portal vein. The liver acts as a storehouse to regulate the number of nutrients flowing into the general blood circulation.
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