Question

write the steps of journey of food for class ​

Answer 1

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The Journey Of Food. Food enters the body through the mouth and exits through the anus. In between, it undergoes digestion (from the mouth to the stomach), absorption (from the stomach to the small intestines), and elimination (from the large intestine, or colon, to the anus).

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Answer 2

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✯DIGESTIVE SYSTEM✅

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The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion.

1. Ingestion of food

The food is taken in the oral cavity in the process called the ingestion. The teeth help in grinding of the food, salivary amylase helps in partial breakdown of the starch and the tongue helps in mixing the food with saliva and helps in swallowing it. The food is now called bolus.

2. Digestion

The process of break-down of complex substances into simpler substances is called digestion and it starts with the mouth where physical break-down occurs along with some chemical digestion. The bolus is swallowed in and it arrives in stomach where the digestion of proteins occurs due to presence of the enzyme pepsin. Bolus is now called the chyme. This chyme now moves into the small intestine where rest of the process of digestion will be completed. The pancreatic juice, the intestinal juice and the bile will result in breakdown of carbohydrates, fats and the rest of the proteins. The chyme is now called the chyle and it moves to the large intestine where the water is absorbed.

3. Absorption

The digested food is absorbed via the finger-like projections present on the inner surface of the small-intestine and the reach the blood stream.

4. Assimilation

The absorbed food is then used by different tissues for the energy generation. The excess food is stored as glycogen in the liver and s fats in adipose tissue.

5. Excretion

The undigested material passes from the small-intestine to the rectum of the large-intestine, from where it is removed from the body through anus.

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