In this Grade 7 Life Science lesson from Chapter 21, students explore how body systems work together to maintain health by examining the roles of the six classes of nutrients — carbohydrates, proteins, fats, vitamins, minerals, and water — and how nutrition supports cell function, growth, and tissue repair. Students also learn why regular exercise is essential for keeping body systems functioning and how drug abuse, eating disorders, and addiction can negatively impact overall health. The lesson builds on prior knowledge of body system interactions and introduces key vocabulary including nutrition and addiction.
Section 1
Nutrients Fuel Body Systems for Health
The body needs six essential nutrients: proteins for tissue building, carbohydrates for energy, fats for essential functions, vitamins and minerals for regulation, and water for transportation and temperature control.
Section 2
Exercise Strengthens Multiple Body Systems
Regular physical activity strengthens the respiratory system by increasing oxygen intake, builds a stronger heart, develops stronger bones, and helps the lymphatic system move antibodies throughout the body.
Section 3
Drug Abuse Damages Critical Body Functions
Substances like nicotine, alcohol, and narcotics harm the body's systems. Nicotine increases heart rate but contains poisons, alcohol impairs thinking and damages organs, while other drugs can cause heart attacks.
Section 4
Addiction Creates Physical and Emotional Dependence
When a person becomes dependent on substances or behaviors, they experience withdrawal symptoms when stopped and require increasing amounts to achieve effects, damaging physical and mental health over time.
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Section 1
Nutrients Fuel Body Systems for Health
The body needs six essential nutrients: proteins for tissue building, carbohydrates for energy, fats for essential functions, vitamins and minerals for regulation, and water for transportation and temperature control.
Section 2
Exercise Strengthens Multiple Body Systems
Regular physical activity strengthens the respiratory system by increasing oxygen intake, builds a stronger heart, develops stronger bones, and helps the lymphatic system move antibodies throughout the body.
Section 3
Drug Abuse Damages Critical Body Functions
Substances like nicotine, alcohol, and narcotics harm the body's systems. Nicotine increases heart rate but contains poisons, alcohol impairs thinking and damages organs, while other drugs can cause heart attacks.
Section 4
Addiction Creates Physical and Emotional Dependence
When a person becomes dependent on substances or behaviors, they experience withdrawal symptoms when stopped and require increasing amounts to achieve effects, damaging physical and mental health over time.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter