Question

organism having Spiny body and radial symmetry

Answer 1

$Here \: is \: the \: answer \: of \: your \: question$


`$\textbf{Answer = Echinodermata}$`


→ Reason :-

* These are spiny skin animals.

The phylum includes star fish, star dollar etc. The body have various shapes like disk like, flower like, melon like etc.

* Radial Symmetry :- In which body can be cut into two equal halves by any plane passing through the centre from top to bottom.


`$\textbf{Other features of Echinodermata}$`

* They have organ level of organization system.

* They are Triploblastic means in which all three layers namely; endoderm, ectoderm and mesoderm are present.

* Body cavity is true coelom.

* Digestive system complete.

* Segmentations are absent.

* They respire through gills.

* Circulatory system is of open type.

Answer 2

Answer :-

The organisms in the "Phylum-Echinodermata", consist of a spiny body which follows the rules of "Radial symmetry".

Eg - Starfish

Extra Information :-~~~~~~~~~~~~~~~~

• In radial symmetry, the body is either in the form of a flat structure or a tall cylinder.

• One end of the longitudinal axis is usually the mouth of the organism.

• In radial symmetry, the body of selected organism can be divided into more than two similar parts by more than two planes, passing through the same axis.

• Radial symmetry is mainly found in organisms such as some Sponges, Hydra, Jellyfish and Sea Urchins.

• The organisms which follow the rules of radial symmetry, are known as "Radial Organisms".