What layers does the body of coelenterates consist of?

The body has two layers:
* external – ectoderm.
* internal – endoderm.
Cells are also tissues. There is a layer of mesogley between the cells. It is a jelly-like substance. The outer layer contains skin-muscle and stinging cells. They have no muscles, but between the layers there are muscular processes responsible for movement. The inner layer contains secretory cells and cells that provide digestive reactions. There are also intermediate cells, thanks to which they are able to recover. Their body is radially symmetrical.