Answer:This food combination is made up of protein, Carbohydrate and fats.
Mechanical digestion of the carbohydrate begins in the mouth during chewing of the sandwich-whole bread. The starch in the bread is broken down by enzyme amylase in the saliva to maltose and this begins chemical digestion. Generally starch-carbohydrate digestion begins in the mouth.
The digesting food moves by peristalsis through the oesophagus to reach the stomach -this is ingestion.
In the stomach milk digestion begins by changing it to curds for easy absorption; Enzyme pepsin acts on the protein fragments of the milk to converts it to small fragments. While enzyme Ligual lipase converts the fatty components to smaller fragments .Both enzymes use the acidic environment provided by the HCL acid in the stomach.
Jelly is Jam, which is made of fruit juice, thus it contains sugars, pectin and water. Therefore it digestion begins in the stomach.
These(Chyme-partially digested food) are pushed to the small intestine,where pancreatic and intestinal enzymes , acts on the carbohydrate, protein, and fats. and converts them to monomers/ end products. Thus starch to glucose, protein to amino acids., and nucleic acids monomers.
Emulsification by the bile acids from the gall bladder and the liver, converts the fats to globules for easy absorption.This is together with the activity of enzymes e.g lipase, the fat is converted to fatty acid.
The amino acids and glucose monomers are absorbed directly into the blood stream through the villi on the wall of the duodenum. Villi increases surface area for absorption .
However fatty acids are larger than the blood vessels diameter. But small chains fatty acids can enter the blood capillaries directly.However longer chains are converted to compound Chylomicron.(cholesterol and protein coat) .This is known as the( the Chyle).It is moved into the Lacteal where they are transported to the lymphatic vessels to reach the left subclavian vein enroute the blood stream. by-passing the liver.
Massive water absorption occurs in the large intestine.The undigested materials from the above food substances are moved into the large intestine, and moved out as faeces.
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