Question

in which animal phylum body cavity appeard for the first time

Answer 1

ANSWER:-
Body cavity appeared first in the phylum Annelida.
PLEASE MARK AS BRAINLIEST

Answer 2

In phylum Annelida, the body cavity appeared for the first time.  

Explanation:

• The body cavity is the true coelom and divided by the internal septum. The 'body is metamerically segmented' and the bilateral symmetry can be seen in this phylum.
• The digestive system is complete and the respiration is done by the body surface. The excretion is done by the nephridia. It has a true circulatory system in the body and the germ layer is triploblastic in nature.  

To know more about phylum

Assertion reason true coelom appeared for the first time in phylum annelida

https://brainly.in/question/5059396

Why is phylum arthropoda considered as most successful phylum

https://brainly.in/question/11730613