The school nurse explains during health class that blood travels from the intestine to the liver in which fashion?
1. Through an artery
2. Through a vein
3. Through osmosis
4. Through active transport
Correct Answer: 2
Rationale 1: Blood is not carried from the intestine to the liver through an artery.
Rationale 2: The portal vein carries blood from the intestine to the liver.
Rationale 3: Blood is not carried from the intestine to the liver through osmosis.
Rationale 4: Blood is not carried from the intestine to the liver through active transport.
Global Rationale: The hepatic portal system is a network of venous vessels that collects blood draining from the stomach, small intestine, and most of the large intestine. This blood is extremely rich in nutrients because it contains substances absorbed during digestion. It is important to know that this blood is delivered to the liver via the hepatic portal vein before it reaches the arterial circulation. The liver then can remove, store, excrete, or perform metabolic functions on these substances before they are sent into the inferior vena cava to reach other organs.
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