Lesson Notes By Weeks and Term v4 - SHS 1
THE HUMAN BODY AND HEALTH
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THE HUMAN BODY AND HEALTH
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: General Science
Class: SHS 1
Term: 2nd Term
Week: 17
Grade code: 3.3.3.LI.2
Strand code: 4
Sub-strand code: 1
Content standard code: 3.3.3.CS.1
Indicator code: 3.3.3.LI.2
Theme: RELATIONSHIPS WITH THE ENVIRONMENT
Subtheme: THE HUMAN BODY AND HEALTH
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In modern Ghana, consumer electronics like mobile phones (e.g., Tecno, Infinix), laptops, and televisions are a part of our daily lives. We use them for communication, learning, and entertainment. However, their use has a direct impact on our physical and mental health. This lesson explores the relationship between the use of these devices and our well-being. We will investigate both the positive and negative health effects and learn about safe usage practices. We will also touch on exciting careers that combine technology and healthcare. Understanding this connection is vital for maintaining a healthy lifestyle in our increasingly digital world.
A. What are Consumer Electronics? Consumer electronics are electronic devices intended for everyday use, typically in homes. Examples in Ghana: Mobile phones, laptop computers, desktop computers, tablets, televisions (e.g., Nasco, Samsung), smartwatches, video game consoles, headphones. B. The Dual Impact of Electronics on Human Health These devices are tools. Like any tool, they can be beneficial or harmful depending on how we use them. i. Positive Health Impacts Access to Health Information: The internet on our phones and laptops gives us instant access to health information from sources like the Ghana Health Service (GHS) website, World Health Organization (WHO), and other reputable health portals. We can learn about diseases, diet, and exercise. Health & Fitness Monitoring: Devices like smartwatches and fitness apps on phones can track our physical activity (number of steps), heart rate, and even sleep quality. This data helps us to be more conscious of our health and set fitness goals. Telemedicine: This is the use of technology to provide healthcare remotely. A person in a rural area like Damongo can have a video consultation with a specialist doctor in Accra. This is a growing field in Ghana, saving time and travel costs. Assistive Technology: Electronics can greatly help people with disabilities. Examples include hearing aids (which are sophisticated electronic devices), screen readers on laptops for the visually impaired, and mobility aids. ii. Negative Health Impacts (and How to Mitigate Them) Digital Eye Strain (Computer Vision Syndrome) Explanation: This is a condition caused by focusing on a digital screen for long, uninterrupted periods. The eyes work harder to focus on pixels, and we tend to blink less, causing dryness. Blue light emitted from screens can also contribute to eye fatigue. Symptoms: Dry, itchy, or watery eyes; blurred vision; headaches; sensitivity to light. Solution: The 20-20-20 Rule. This is a very simple and effective method. Every 20 minutes you spend looking at a screen... ...look at something 20 feet (about 6 metres) away... ...for at least 20 seconds. This allows your eye muscles to relax. Musculoskeletal Problems (Posture and Pain) Explanation: Our bodies are not designed to be in one position for hours. "Tech Neck": This is the stress and pain in the neck and shoulders caused by constantly looking down at a phone or a poorly positioned laptop. The head is heavy, and this posture puts immense strain on the cervical spine. Repetitive Strain Injury (RSI): This affects the wrists and hands from repetitive actions like typing and using a mouse. It can lead to pain, numbness, and weakness. Solutions: Ergonomics: Arrange your workspace correctly. Your screen should be at eye level. Your back should be straight, and feet flat on the floor. Take Breaks: Stand up, stretch, and walk around for a few minutes every hour. Hold Your Phone Correctly: Try to bring your phone up to eye level instead of looking down at it. Sleep Disruption Explanation: The blue light from screens suppresses the body's production of melatonin, the hormone that regulates our sleep-wake cycle. Using phones or laptops right before bed tricks our brain into thinking it's still daytime, making it harder to fall asleep and reducing the quality of sleep. Solution: Stop using all screens at least 60-90 minutes before bedtime. Use "night mode" or "blue light filter" settings on your devices in the evening. Keep your phone out of your bedroom. Mental Health Issues Explanation: Constant notifications, the pressure to be perfect on social media, and exposure to negative news or cyberbullying can lead to anxiety, depression, and low self-esteem. Solution: Digital Detox: Set specific times of the day when you will not use your devices. Curate Your Feed: Unfollow accounts that make you feel bad about yourself. Turn off Non-Essential Notifications: Take control of when your phone demands your attention. C. Careers Linking Electronics and Health Biomedical Equipment Technician: These professionals install, maintain, and repair critical medical electronic equipment in hospitals and clinics—like ECG machines, patient monitors, and ultrasound scanners. They are essential for keeping our healthcare system running. Health Informatics Specialist: They manage and analyse health data using technology. They work on electronic health record systems (like the one used by NHIS) to improve patient care and make healthcare delivery more efficient. Telemedicine Coordinator: This person sets up and manages the technology that allows doctors and patients to connect remotely, ensuring the systems are working and that consultations run smoothly.
Guided Practice (With Solutions)
Instructions: As a class, let's work through these scenarios together.
Question 1: Akosua is an SHS1 student who spends about 4 hours every evening after school using her tablet to do research for her assignments and chat with friends. She has been complaining of frequent headaches and dry, itchy eyes. Based on what we have learned, what is the likely health issue she is facing, and what is the scientific reason for it? Solution & Commentary: Health Issue: Akosua is likely suffering from Digital Eye Strain or Computer Vision Syndrome. Scientific Reason: This is caused by prolonged focus on the digital screen of her tablet. Her eye muscles are overworked, and she is likely blinking less frequently, which causes dryness. The blue light emitted from the screen can also contribute to the eye fatigue and headaches she is experiencing.