Page 112 - Science Class 06

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Animals—Form and Function

• Structure of Body • Human Skeleton System • Movement and Locomo on

• Movement i n H uman Beings • Body Structure of Some Other Animals and Movement
• Some Important Life Processes of Human Beings

There are many different types of animals in the respiratory systems are quite complex with

the world. Many animals are quite similar to many addi onal func ons. Even the sensory
each other. Others are quite different. organs are more advanced, which help
In the animal kingdom, animals have been vertebrates adapt to their respec ve

classified into two main categories— environment.
vertebrates and invertebrates based on the On average, the overall count of vertebrates
presence or absence of the backbone or a exis ng on the planet earth is around

spinal column. Apart from this, there are 57,000 to 58,000.
more differences between vertebrates and Examples of vertebrate include all chordates
invertebrates. such as mammals, birds, fish, rep les,

STRUCTURE OF A BODY amphibians, etc. The main characteris cs of

Vertebrates the vertebrates are that members have
bilaterally symmetrical bodies and a brain
Vertebrates are the most advanced form of
enclosed by a skull.
species in the animal kingdom. Members
possess a well-defined internal skeleton
system which includes a backbone. In humans,
the spinal cord runs along the body between

the caudal and cranial regions connec ng to
the nerve ssues. Vertebrates also have more
complex and specialised organ systems when
compared to invertebrates. Organ systems like
Vertebrates

112 Science-6