Page 32 - ICSE Science 3 : E-book

• Avoid burning of wood, leaves, coal, polythene and garbage.

• Avoid the use of plastic or polythene bags. Use jute or cloth bags instead.

• Recycle paper, plastic and other waste materials.
• Educate people about the diff erent ways of reducing air pollution.

TERMS TO KNOW

1. Organ: Part of the body that has a particular function to perform
2. External organs: Organs that we can see

3. Internal organs: Organs that are located inside the body which we cannot see
4. Skull: A bony structure that surrounds and protects the brain

5. Ribcage: Structure of bones (called ribs) that surrounds and protects the chest
6. Organ system:A group of organs that work together to perform a particular function

7. Respiratory system: The body system that deals with breathing
8. Windpipe: An air passage that carries air from the nose to the lungs in the body

9. Lungs: Spongy bag-like structures that are located in the chest cavity
10. Breathing: Process of taking in oxygen and giving out carbon dioxide

11. Diaphragm: An organ that helps the lungs to expand and contract while breathing
12. Deep breathing: Method of breathing in a lot of oxygen-rich air

13. Air pollution: The addition of harmful substances to the air as a result of human
activities

QUICK LOOK

1. Our body is made of diff erent parts that work together to help us carry out our
bodily activities.

2. Our body consists of internal and external organs.

3. Brain, heart, lungs, liver, stomach, intestines and kidneys are the internal organs of
the body.
4. A human body has several organ systems that work together to keep it functioning.

5. Nose, windpipe and lungs are the organs of the respiratory system.
6. The diaphragm helps our lungs to move upwards and downwards while breathing.

7. Deep breathing is a type of pranayama.
8. Air pollution makes the air impure and unsafe for breathing. It aff ects the health of
all living things.

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