Final answer:
One disadvantage of absorbed fats traveling in the lymphatic vessels to the venous system before reaching the liver is that it can delay the processing of these fats by the liver.
Step-by-step explanation:
One disadvantage of absorbed fats traveling in the lymphatic vessels to the venous system before reaching the liver is that it can delay the processing of these fats by the liver. The lymphatic system acts as an additional route for the absorption and transport of dietary fats, but it bypasses the first-pass metabolism that occurs in the liver. This means that the fats may not be efficiently metabolized and processed as quickly as they would if they directly entered the liver through the hepatic portal vein.