9. Kingdom Animalia

These organisms are heterotrophic, and hence they rely on other organisms for their food. Most of the animals can move, unlike plants. They have a growth pattern by which the adult animals have a specific shape and size.

 

The majority of the animals have well-defined organ systems such as respiratory systems, digestive systems, excretory systems etc., They also have a nervous system which is why they can respond to an external stimulus.

The presence of body parts, in size, shape, and relative position, on opposite sides of a dividing line in the living organisms is known as body symmetry. Animals are classified based on their body symmetry into three types. They are as follows:

 

 

Radial symmetry: A symmetry in which the sides exhibit regularity of parts around a central axis.

  

Bilateral symmetry: The form of symmetry in which the opposite sides are similar.

  

Asymmetry: The lack or absence of symmetry.