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succusentericus which carry this process further that is small molecules of |
proteins are broken down to further smaller molecules. The same is the |
condition with fats. Carbohydrate digestion that started in the mouth and did |
not occur in the stomach, resumes now as the medium gradually changes to |
an alkaline one and the enzymes become active for carbohydrate breakdown. |
Activity-4 |
LA |
Studying the enzymes chart |
Let us study the chart showing different enzymes and digestive juices |
and their functions. |
TE |
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Table-1: Digestive enzymes |
S.No. Enzyme/Substance Secreted by Secreted into Digestive juice Acts on Products |
1 Ptyalin Salivary glands Buccal cavity Saliva Carbohydrates Maltose |
(salivary amylase) |
2 Pepsin Gastric glands Stomach Gastric juice Proteins Peptones |
T |
null |
null |
null |
3 Bile Liver Duodenum Bile juice Fats Emulsification |
(No enzymes) breaking down |
ER |
null |
null |
null |
null |
of large fats |
into small |
globules |
4 Amylase Pancreas Duodenum Pancreatic juice Carbohydrates Maltose |
5 Trypsin |
Trypsin Pancreas Duodenum Pancreatic juice Proteins Peptones |
SC |
null |
null |
null |
null |
6 Lipase Pancreas Duodenum Pancreatic juice Fats Fatty acids |
and glycerol |
7 Peptidases Intestinal glands Small Intestine Intestinal juice Peptides Amino acids |
8 Sucrase Intestinal glands Small Intestine Intestinal juice Sucrose Glucose |
(Cane Sugar) |
null |
Name the enzymes which act on carbohydrates? |
Free distribution by T.S. Government 2019-20 15 |
Which juice contains no enzymes? |
What are the end products of fats? |
What are the enzymes that act on proteins? |
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A |
Transport of the products of digestion from the intestine into blood |
(through the wall of intestine) is called absorption. Internally, intestinal |
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AN |
wall has a number of finger like projections called Microvilli. The villi |
increase the surface area for absorption. Blood vessels and lymph vessels |
are present in the form of a network in the villi. |
Products of digestion are absorbed first into the villi and from here |
into the blood vessels and lymph vessels. Thus after maximum absorption |
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NG |
of food in the small intestine the rest passes into the large intestine. Here |
most of the water present is taken up from this material. This material is |
then expelled through the anus which is the last part of the alimentary |
canal. This passage of undigested material from the body by the way of |
anus is called defecation. Food that passes out of the anus still contains |
considerable amount of proteins, fats and carbohydrates, roughages or |
LA |
fibres of either carbohydrates or proteins. We will learn some more points |
about the coordination about digestive system with other systems in the |
chapter coordination in life processes. |
Flow chart of human digestive system |
TE |
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What do you think is the process of digestion? |
What are its major steps? |
null |
Food Mouth Buccal cavity Pharynx |
T |
null |
null |
null |
Stomach Oesophagus |
ER |
null |
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