Our Body and Health

Overview

Our Body and Health is a foundational topic in Environmental Studies that connects biological knowledge with everyday health practices. For HP TET, this topic tests your understanding of human body structure, the five sense organs and their functions, and personal hygiene concepts that primary school teachers must convey to young learners.

This topic carries dual importance: you need factual accuracy about body parts and their functions, and you must understand how to teach these concepts to children aged 6-11 years. Questions typically involve identifying organ functions, matching sense organs to their uses, and applying hygiene principles to classroom scenarios. Expect 2-4 questions from this area in the EVS section.

Mastery here requires knowing the major body systems at a basic level, understanding how sense organs help us perceive the world, and connecting hygiene practices to disease prevention—all framed within a child-friendly teaching approach.

Key Concepts

• **External body parts** are visible structures (head, eyes, ears, nose, hands, legs) that children can observe and name; internal organs (heart, lungs, stomach, brain) work inside the body and cannot be seen directly.

• **The five sense organs** are eyes (sight), ears (hearing), nose (smell), tongue (taste), and skin (touch)—each connected to the brain which processes all sensory information.

• **Organ systems work together**: The skeletal system (bones) provides framework, muscular system enables movement, digestive system processes food, respiratory system handles breathing, and circulatory system transports blood.

• **Personal hygiene** means practices that maintain cleanliness and prevent disease—bathing, handwashing, dental care, nail trimming, and wearing clean clothes.

• **Balanced diet** includes carbohydrates, proteins, fats, vitamins, minerals and water in proper proportions for growth and energy.

• **Good health** is not merely absence of disease but complete physical, mental and social well-being (WHO definition simplified for children).

• **Germs and disease transmission**: Microscopic organisms spread through contaminated water, food, air, and contact—handwashing is the primary defence.

• **Growth and development** differ: growth is increase in size (measurable), development is increase in complexity and function (qualitative).

Key Facts

| Topic | Must-Remember Facts | |-------|---------------------| | Bones | Human body has 206 bones; skull protects brain; ribcage protects heart and lungs | | Heart | Located slightly left of centre in chest; pumps blood; beats about 72 times per minute in adults | | Lungs | Two lungs; right lung has 3 lobes, left has 2; take in oxygen, release carbon dioxide | | Teeth | Milk teeth: 20; permanent teeth: 32; includes incisors, canines, premolars, molars | | Skin | Largest organ of the body; protects internal organs; regulates body temperature | | Eyes | Pupil controls light entry; retina receives images; tears keep eyes clean and moist | | Tongue | Has taste buds; detects sweet, salty, sour, bitter, and umami | | Blood groups | Four main types: A, B, AB, O | | Normal body temperature | 37°C or 98.6°F | | Handwashing duration | Minimum 20 seconds with soap |