Once absorbed, amino acids travel from the small intestine via the portal vein to the liver.
Answer:
the cell membrane
Explanation: Cell membrane protects animals cells from harmful chemicals. Explanation: The cell membrane is a tough covering composed of the phospholipids and proteins and forms a bilayer around the cells
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The next time he goes surfing, he will get tired a lot faster and will run out of breath a lot faster. He will also feel a lot more tired quicker than he used to.
