Banu's blog for school students

What is malnutrition ? Explain some nutrition deficiency diseases. A.  Eating of food that does not have one or more than one nutrients in required amount is known as malnutrition. Reasons of malnutrition: Poor health, willfull starvation, lack of awareness of nutritional habits, socio - economic factors are all the reasons for malnutrition. Malnutrition is of three types : Calorie malnutrition, 2) Protein malnutrition, 3) Protein calorie malnutrition. 1) Kwashiorkor disease: This is due to protein deficiency in diet. Body parts become swollen due to accumulation of water in the intercellular spaces. Very poor muscle development, swollen legs, fluffy face, difficult to eat, diarrhoea, dry skin are the symptoms of this disease. 2) Marasmus : This is due to deficiency of both proteins and calories. Generally this disease occurs when there is an immediate second pregnancy or repeated child births. Lean and weak, swelling limbs, less developed muscles, dry skin, diarrhoea, etc., are the sy

HUMAN DIGESTIVE SYSTEM DIGESTION IN HUMANS  The process in which the complex  food  materials are  broken down into simpler ones by the action of enzymes and then absorbed in the blood is called digestion. In humans ,the process of digestion is carried out by the different organs which makes up a long tube called alimentary canal. It starts from mouth and ends with anus. There are different gastric glands associated with the digestive system such as liver , pancreas, salivary glands etc which secrete their juices to help in digestion. THE PROCESS OF DIGESTION: The food after entering into MOUTH  is cut,teared and broken down into small pieces by the teeth . A digestive juice  called saliva is secreted by the three pairs of salivary glands . Two pairs of these sallivary glands are present near the jaws and one pair is present below the tongue. Saliva has an enzyme called salivary amylase or ptyalin,which helps in breaking down the complex carbohydrates into simple sugar,maltose. The ton