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Glucose is absorbed through the intestial epithelium to the blood.
In August 1960, Robert K. Crane presented for the first time his discovery of the sodium-glucose cotransport as the mechanism for intestinal glucose absorption.
Crane's discovery of cotransport was the first ever proposal of flux coupling in biology and was the most important event concerning carbohydrate absorption in the 20th century.1
From the blood it enters the interstial space and then through the cell membrane.
Reference
1. http://www.slideshare.net/namarta28/digestion-and-absorption-of-carbohydrates
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