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About digestive system in human being |
| Answer» The digestion of human include five basic steps:- 1) Ingestion:- taking in of nutrient2) Digestion:- Process through which complex food substances are broken down into simpler food substances.3) Absorption:- This occurs in small intestine where important food nutrients are absorbed and transported through body fluid or blood to various body parts.4) Assimilation:- Further, water and water soluble nutrients are absorbed in the Large intestine and sent to the body cells.5) Egestion:- The undigested food substances are expelled out of the body.Our digestive system also known as Alimentary canal contains:-1] Mouth:- An open slit through which the food is ingested.2] Buccal cavity:- It contains Tongue for swallowing the food and teeth to break the food particles into smaller and soluble form. Our saliva generated by the salivary gland help in lubricating the food so that it doesn\'t choke in the oesophagus.3] Oesophagus:- also known as food pipe helps in pushing the food into the stomach by a contraction and relaxation movement known as Peristalsis.4]Stomach:- The food is sent here so that it can be churned well. Our stomach is a J - shaped organ on the left of the abdomen. It has HCl, Pepsin and Mucus in it.5]small intestine:- Th food is sent here to absorb all the important nutrient like Carbohydrates, Proteins and fats into its simpler substance (i.e Glucose, Amino acids and Fatty acids).6] Large intestine:- the water and water soluble nutrients are absorbed in the large intestine and the undigested food are expelled out of the body through **** in the form of Faeces. | |