Page 27 - ICSE Science 3 : E-book

TIME TO REVISE

Identify and write the names
of the given internal organs
of the human body. Also,
mention their function in one
line.

Let’s learn about the respiratory system in this chapter.r.

nose
Respiratory System in Humans
throat
The organ system that deals with breathing is mouth
windpipe
known as the respiratory system. It is the group
lungs
of organs in our body that help us to breathe
in and out. The respiratory system comprises of

nose, windpipe and lungs. This system supplies
oxygen to our body and removes carbon dioxide

from it.
Respiratory organs
Organs of the respiratory system

Nose: We breathe in and breathe out air through Did You Know!

our nose. The process of breathing in air is called Germ is a very small living
thing that we cannot see
inhalation while breathing out is called exhalation. with our eyes. It can cause

various infections and
Our nose consists of fi ne hair, and a sticky material
diseases.
called mucus inside it.

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