Page 25 - ICSE Science 3 : E-book

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Human Body

Our body is made of diff erent parts that KEY CONCEPTS

work together to help us carry out various
• Internal organs of the human body
bodily activities.
• Respiratory system in humans
Each part has a particular function to • Deep breathing
perform and is called an organ. We can • Air pollution

see some of our organs such as the eyes,
ears, nose, skin and tongue. These are

called our external organs. There are some

other organs that are located inside our
body. We cannot see them. These are our
internal organs such as brain, heart, lungs
Did You Know!
and stomach. Our body is made of a number of

cells. These are the smallest structures
Each organ performs a specifi c function. of which all living things are made.
A group of organs that work together to Many cells group together to form
a tissue, tissues together form an
perform a particular function is called an
organ, and organs together
organ system. Our body has several organ form an organ system.

systems that work together to keep it
functioning.

Human body comprises of respiratory system, skeletal system, muscular
system, circulatory system, digestive system, excretory system, nervous system,

reproductive system and lymphatic system.

Internal Organs of the Human Body

The internal organs play an important role in our survival. They are located at
specifi c places in our body. The location and functions of these organs are as

follows.

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