Human Body and Health

Overview

Human Body and Health is a core component of Environmental Studies (EVS) in TS TET Paper I, designed for candidates aspiring to teach classes 1-5. This topic tests your understanding of how the human body functions, the importance of balanced nutrition, common diseases affecting children, and basic hygiene practices. Since EVS integrates science with daily life, examiners frequently frame questions around practical scenarios—what a child should eat, how diseases spread, or why handwashing matters.

For the exam, you must know the major organ systems (their parts and functions), nutritional requirements at different ages, causes and prevention of common childhood diseases, and hygiene habits that promote health. Questions often appear as application-based MCQs where you identify a deficiency disease from symptoms or choose the correct hygiene practice. Mastering this topic also helps in pedagogy questions about teaching health education through activities.

Key Concepts

• **Organ systems work together**: The human body has interdependent systems—digestive, respiratory, circulatory, excretory, skeletal, muscular, and nervous—each performing specific functions but relying on others for overall health.

• **Nutrition is about balance, not just food**: A balanced diet includes carbohydrates, proteins, fats, vitamins, minerals, water, and roughage in appropriate proportions based on age, activity, and health status.

• **Deficiency diseases arise from nutritional gaps**: Lack of specific nutrients causes identifiable diseases—iron deficiency causes anaemia, Vitamin A deficiency causes night blindness, and so on.

• **Communicable vs non-communicable diseases**: Communicable diseases spread through air, water, food, or contact (malaria, typhoid), while non-communicable diseases do not spread person-to-person (diabetes, anaemia).

• **Hygiene prevents disease transmission**: Personal hygiene (handwashing, bathing) and environmental hygiene (clean water, waste disposal) break the chain of infection.

• **Vaccination builds immunity**: Immunisation protects children from preventable diseases like polio, measles, and tetanus through scheduled doses.

• **First aid is immediate care**: Basic knowledge of first aid for cuts, burns, fractures, and bites is essential for teachers handling young children.

Key Facts

| Category | Must-Remember Facts | |----------|---------------------| | **Digestive System** | Mouth → Oesophagus → Stomach → Small intestine (absorption) → Large intestine → Rectum. Saliva begins starch digestion. | | **Respiratory System** | Nose → Trachea → Bronchi → Lungs (alveoli). Oxygen absorbed, carbon dioxide expelled. | | **Circulatory System** | Heart pumps blood; arteries carry oxygenated blood (except pulmonary artery); veins carry deoxygenated blood (except pulmonary vein). | | **Excretory System** | Kidneys filter blood to produce urine; skin excretes sweat; lungs expel CO₂. | | **Skeletal System** | 206 bones in adults; protects organs, provides structure, produces blood cells in bone marrow. | | **Nervous System** | Brain, spinal cord, and nerves; controls voluntary and involuntary actions. |