Differnentiate ctenophora and Echinodermeta according to their body organisation and body symmetry.

Explanation

To differentiate between Ctenophora and Echinodermata according to their body organization and body symmetry, we can follow these steps:

### Step 1: Body Organization
- **Ctenophora**: The body organization of Ctenophora is at the tissue level. They have a simple body structure with two main layers of cells (ectoderm and endoderm) and a gelatinous substance in between called mesoglea. They do not have complex organs.

- **Echinodermata**: In contrast, Echinodermata exhibit a more complex body organization at the organ level. They have specialized organs and systems, including a water vascular system, which is unique to this phylum. Their body is also divided into a central disc and radiating arms.

### Step 2: Body Symmetry
...