Health and Nutrition

Overview

Health and Nutrition forms a core component of Environmental Studies in KAR TET Paper I, directly connecting science concepts with children's daily lives. This topic tests your understanding of what constitutes a balanced diet, the consequences of nutritional deficiencies, and the role of personal hygiene in maintaining health.

For the exam, expect questions on food groups and their functions, matching deficiency diseases with missing nutrients, and identifying correct hygiene practices. The pedagogy angle often appears too—how would you teach a Class III child about washing hands, or help students from different economic backgrounds understand nutrition without creating stigma? Master both the content and its classroom application.

This topic aligns with NCF 2005's emphasis on linking school knowledge with children's lived experiences. Questions frequently draw from Karnataka's local context—ragi as a calcium source, local fruits and vegetables, and regional dietary practices.

Key Concepts

• **Balanced diet** contains all nutrients in correct proportions: carbohydrates, proteins, fats, vitamins, minerals, water, and roughage. No single food provides everything.

• **Nutrients serve specific functions**: carbohydrates and fats provide energy, proteins build and repair body tissues, vitamins and minerals regulate body processes and prevent diseases.

• **Food groups simplify meal planning**: cereals and millets (energy), pulses and legumes (protein), fruits and vegetables (vitamins and minerals), milk and dairy (calcium and protein), fats and oils (concentrated energy).

• **Deficiency diseases occur when specific nutrients are chronically missing** from the diet—they are preventable through dietary correction, not medicines alone.

• **Personal hygiene breaks the chain of disease transmission**—handwashing, dental care, bathing, and clean clothing prevent infections caused by bacteria, viruses, and parasites.

• **Water and sanitation are inseparable from nutrition**—contaminated water causes diarrhoea, which leads to malnutrition even when food intake is adequate.

• **Malnutrition includes both undernutrition and overnutrition**—obesity from excessive calories is also a form of malnutrition, increasingly relevant in urban India.

Formulas / Key Facts

| Nutrient | Main Sources | Function | Deficiency Disease | |----------|--------------|----------|-------------------| | Vitamin A | Carrot, papaya, liver, green leafy vegetables | Vision, skin health, immunity | Night blindness, xerophthalmia | | Vitamin B1 (Thiamine) | Whole grains, pulses, nuts | Nerve function, energy metabolism | Beri-beri | | Vitamin C | Citrus fruits, amla, guava, tomato | Wound healing, immunity, iron absorption | Scurvy (bleeding gums, weakness) | | Vitamin D | Sunlight, fish, fortified milk, egg yolk | Calcium absorption, bone health | Rickets (children), osteomalacia (adults) | | Iodine | Iodised salt, seafood | Thyroid function, brain development | Goitre, cretinism | | Iron | Green leafy vegetables, jaggery, meat, dates | Haemoglobin formation | Anaemia (weakness, pale skin) | | Calcium | Milk, ragi, green leafy vegetables, sesame | Bone and teeth formation | Weak bones, dental problems | | Protein | Pulses, milk, eggs, fish, soybean | Growth and repair of tissues | Kwashiorkor (swelling), Marasmus (wasting) |