South 고등학교 2학년 Health
Chapters: 5
1. Health and wellbeing
Health and its determinants · Body signals and health indicators · Health across the lifespan · History of health care · Disease prevention
- Healthy Lifestyle: Daily Habits That Keep You Well – A healthy lifestyle is a set of daily habits: a balanced diet from five food groups, enough water, 9–11 hours of sleep for school-age children and about 8–10 for teenagers, at least 60 minutes of activity a day, good posture, safe food handling and avoiding tobacco, alcohol and drugs. These habits lower the risk of lifestyle (non-communicable) diseases such as type 2 diabetes, heart disease and some cancers.
- Public Health – Public health is the work of keeping whole communities healthy: preventing disease, promoting healthy living and making sure everyone can get care. Infectious diseases spread through air, water, food, touch and insects; hygiene, clean water, sanitation and vaccination break the chain. When enough people are immune, herd immunity protects the rest. Health systems work in levels (primary, secondary, tertiary) and use surveillance data to spot outbreaks early.
2. Emotional and mental health
Medicine misuse · Substance and behavioural addiction · Elements of mental health · Emotions and life · Life, death and loss
- Addiction: How It Starts and How to Stay Free – Addiction is losing control over a substance or a behaviour, even when it causes harm. It can be to substances (tobacco, alcohol, drugs, misused medicines) or to behaviours (gaming, gambling, social media). Each use gives the brain a burst of dopamine, which teaches it to repeat the action; with time tolerance grows and you need more. Warning signs are craving, loss of control, compulsion and carrying on despite harm. Protection comes from refusal skills, healthy rewards, sleep and routine, and asking for help early. Addiction is treatable.
- Mental Health: Feelings, Stress and Support – Mental health is how we think, feel, cope and get along with others. Like physical health, everyone has it and it moves up and down. Emotions are useful signals. Stress adds up like water in a bucket; healthy coping (sleep, movement, talking, calm breathing, planning) lets it drain. Self-esteem and good relationships protect us. If feelings stay very heavy for two weeks or more, or stop daily life, talk to a trusted adult or a professional — asking for help is a sign of strength.
- Emotions: Nature, Expression, Culture and Management – An emotion is a strong feeling with three parts: body arousal, a thought or appraisal of the event, and an outward expression. There are a few basic emotions that vary in intensity and can mix. Emotions are shown by face, voice and body; basic facial expressions are widely shared, but culture sets display rules. Negative emotions can be managed (awareness, reappraisal, relaxation, exercise, support) and positive ones built (gratitude, hope, kindness, friends, flow).
3. Sexuality and health
Sexuality across life · Body image · Love and sexual self-determination · Social context of sexual rights · Sexually transmitted infections · Preventing sexual violence
- Sexual Health: Growing Up Safe and Informed – Sexual health means physical, emotional and social well-being related to sexuality, not just the absence of disease. Puberty (about 8–14 years, different for everyone) is driven by hormones and brings body and feeling changes. Sexuality is part of life from childhood to old age and includes identity, feelings, relationships and values. A healthy body image means accepting that real bodies differ and media images are often edited. Consent must be free, clear, informed and can be withdrawn; everyone has rights to information, safety, privacy and health care. STIs spread through sexual contact and some body fluids; many have no signs; prevention includes abstinence, condoms, vaccines (HPV, hepatitis B), testing and early treatment. Get information from reliable sources and trusted adults.
- Respect, Consent and Gender Equality: Sexual Ethics for Teens – Sexual ethics means treating your own body and other people with respect. Consent must be clear, free, informed and can change at any time. Pressure, fear or power make a "yes" invalid. Everyone has equal rights whatever their gender, and anyone can ask a trusted adult for help.
- Safety Education: Staying Safe at Home, on the Road and with People – Safety means spotting hazards early and acting before harm happens. Risk = likelihood × harm. Keep exits clear and use stairs in a fire, follow traffic rules and wear a helmet or seat belt, wash hands and use medicine correctly, and in any unsafe situation with a person: say NO, GO away and TELL a trusted adult.
4. Safety and first aid
Health safety · Basic physiology and pathology · Infection and immunity · Occupational health · CPR and emergencies
- Safety Education: Staying Safe at Home, on the Road and with People – Safety means spotting hazards early and acting before harm happens. Risk = likelihood × harm. Keep exits clear and use stairs in a fire, follow traffic rules and wear a helmet or seat belt, wash hands and use medicine correctly, and in any unsafe situation with a person: say NO, GO away and TELL a trusted adult.
- Human Body Systems – Your body is organised in levels: cells make tissues, tissues make organs, organs make organ systems, and all systems together make you, the organism. Each system has a main job: skeletal (frame), muscular (movement), circulatory (transport), respiratory (gas exchange), digestive (food), excretory (waste), nervous and endocrine (control), immune (defence), integumentary (skin, hair, nails) and reproductive. No system works alone: during exercise the muscles, heart, lungs and nerves all change together to keep the inside of the body steady (homeostasis).
- The Immune System: How Your Body Fights Germs – Germs (pathogens) cause infectious disease. The body has three lines of defence: barriers (skin, mucus, acid), a fast general (innate) response (inflammation, fever, phagocytes) and a slow, specific (adaptive) response (B cells make antibodies, T cells kill infected cells). Memory cells make the second attack fast. Vaccines create memory safely. Immunity can go wrong: allergy, autoimmune disease, immunodeficiency (e.g. HIV).
- Occupational Health: How Work Affects Health and How to Protect Workers – Occupational health is about keeping workers healthy and safe. Workplaces can have physical, chemical, biological, ergonomic and psychosocial hazards. Long exposure can cause occupational diseases such as silicosis, noise-induced hearing loss and back injuries. We prevent harm by improving the working environment (using the hierarchy of controls) and by managing workers' health with check-ups, limits on exposure and training.
- First Aid: What to Do in an Emergency – First aid is the help you give an injured or ill person until trained help arrives. Its aims: preserve life, stop things getting worse, help recovery. Follow DRABC: Danger, Response, Airway, Breathing, CPR/Call. Breathing but unresponsive → recovery position. Not breathing normally → CPR 30:2 at 100-120 pushes a minute, 5-6 cm deep, and an AED. Bleeding → direct pressure. Burns → cool running water 20 minutes. Choking → back blows and abdominal thrusts. Sprains → RICE.
5. Health resources and culture
Right to health and services · Responsible health citizens · Digital health · Climate and health · Health choices in society
- Public Health – Public health is the work of keeping whole communities healthy: preventing disease, promoting healthy living and making sure everyone can get care. Infectious diseases spread through air, water, food, touch and insects; hygiene, clean water, sanitation and vaccination break the chain. When enough people are immune, herd immunity protects the rest. Health systems work in levels (primary, secondary, tertiary) and use surveillance data to spot outbreaks early.
- Climate Change and the Greenhouse Effect – Climate is the average weather of a place over about 30 years. Greenhouse gases like carbon dioxide and methane trap some of the heat the Earth gives off. Humans have added a lot more of these gases by burning fossil fuels and cutting forests, so the Earth is warming. This causes melting ice, rising seas and more extreme weather. We can cut emissions (mitigation) and prepare for changes (adaptation).
- Healthy Lifestyle: Daily Habits That Keep You Well – A healthy lifestyle is a set of daily habits: a balanced diet from five food groups, enough water, 9–11 hours of sleep for school-age children and about 8–10 for teenagers, at least 60 minutes of activity a day, good posture, safe food handling and avoiding tobacco, alcohol and drugs. These habits lower the risk of lifestyle (non-communicable) diseases such as type 2 diabetes, heart disease and some cancers.