Page 280 - New Medley 5 Semester 2

Competencies
C-3.1, C-4.7

• Critical thinking
• Scientific temper
• Environmental literacy
21st CENTURY SKILLS
• AIL
3 A Long and

Healthy Life

Warm Up

Which of the following keep us healthy?

In ancient time, diseases were considered a curse of God. Today, science

and technology have changed everything. Now various instruments,
medicines and techniques are available to cure diseases.

To lead a healthy and long life, we need healthy and nutritious food, clean
and pollution-free environment and proper medical aid. We must take

precautions to prevent occurrence of diseases. We know that prevention
is better than cure.

Medical Instruments

A large variety of instruments have been invented and developed to
identify and diagnose diseases. Some of them like clinical thermometer,
stethoscope, microscope, etc., are very simple. Many others like X-ray

machine, CT scan, MRI, ventilators, etc., are very complex machines.

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