what is digestion explain with example
Answers
Answer:
(1) (physiology) The catabolic process in the digestive tract where ingested food is converted into simpler, soluble and diffusible substances that can be assimilated by the body. (2) (microbiology) The process of decomposing organic matter through microbial activity.
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Answer:
ANSWER.
Explanation:
The mouth and oesophagus
Digestion begins in the mouth. The food is ground up by the teeth and moistened with saliva to make it easy to swallow. Saliva also has a special chemical, called an enzyme, which starts breaking down carbohydrates into sugars.
The stomach
The food passes through a sphincter, or small muscle ring, into the stomach. Here it is mixed with gastric juices. The stomach is a muscular bag and it churns the food to help break it down mechanically as well as chemically.
The small intestine
Once in the duodenum, the food is mixed with more digestive enzymes from the pancreas and bile from the liver. Food is then squeezed into the lower parts of the small intestine, called the jejunum and the ileum. Nutrients are absorbed from the ileum, which is lined with millions of finger-like projections called villi.
Pancreas
The pancreas is one of the largest glands in the human body. As well as digestive juices, it secretes a hormone called insulin. Insulin helps to regulate the amount of sugar in the blood. Diabetes is a condition caused by problems with insulin production.
Liver
The liver has a number of different roles in the body, including:
breaking down fats, using bile stored in the gall bladder
processing proteins and carbohydrates
filtering and processing impurities, drugs and toxins
generation of glucose for short-term energy needs from other compounds like lactate and amino acids.