Other factors affect the efficiency of uptake. These include;

·        Presence of glucose and amino acids absorption linked to movement of sodium ions across membranes, presence of vitamin D for calcium ion.

·        Large surface area available for absorption.

The wall of the ileum is efficient in this activity because it is very long, and its walls are folded to provide more projections. These walls also have tiny like fingers on them called villi. On the lining of these villi are minute projections with tiny like hairs on them. These are known as microvilli. It is in the capillaries of the villi where food substances enter, such as sugars, amino acids and minerals. They then enter the arterioles which merge with the hepatic portal vein, from there it is carried in the blood to the liver. The liver is responsible for regulating the variations of food absorbed. It will store the excess substances, and release them when the level in the hepatic portal vein is low. This is the reason why all blood from the intestines are sent to the liver first, if not the consequences of  fluctuations in blood would be damaging. The liver is also capable of detoxification. This is the process where any harmful substances present in the body are broken down and disposed of.

Fatty acids and glycerol from lipid digestion are recombined after they have entered the epithelium cells that line the villi, from there they enter the lacteals rather than the blood capillaries. They are then transported in the lymph vessels to later meet up at the venous system

The wall of the ileum is efficient in this activity because it is very long, and its walls are folded to provide more projections. These walls also have tiny like fingers on them called villi. On the lining of these villi are minute projections with tiny like hairs on them. These are known as microvilli. It is in the capillaries of the villi where food substances enter, such as sugars, amino acids and minerals. They then enter the arterioles which merge with the hepatic portal vein, from there it is carried in the blood to the liver. The liver is responsible for regulating the variations of food absorbed. It will store the excess substances, and release them when the level in the hepatic portal vein is low. This is the reason why all blood from the intestines are sent to the liver first, if not the consequences of  fluctuations in blood would be damaging. The liver is also capable of detoxification. This is the process where any harmful substances present in the body are broken down and disposed of.

Fatty acids and glycerol from lipid digestion are recombined after they have entered the epithelium cells that line the villi, from there they enter the lacteals rather than the blood capillaries. They are then transported in the lymph vessels to later meet up at the venous system