Hydra is in the phylum of the cnidarians which is a radical symmetry. so ectoderm, the outer layr which form the nerve sytem. Also, the endoderm, the inner layer are presented in the hydra.
two layers but so have three
A hydra typically has two cell layers: an outer layer of epithelial cells and an inner layer of gastrodermal cells. These layers are separated by a jelly-like extracellular matrix called the mesoglea.
Hydra exhibit tissue level organization, where cells are organized into tissues but lack specialized organ systems. They have two layers of cells, an outer epidermis and an inner gastrodermis, separated by a jelly-like substance called mesoglea.
The answer is probably sponges.
There is only a single layer of cells in onion tissue. However, sometimes the tissue can fold over itself and appear to have two layers.
First one has three and the second one has two germ layers.
how many tissue layers do the phylum arthropoda have
During an incision, the tissue layers typically involved include the skin, subcutaneous tissue (fatty tissue beneath the skin), and muscle tissue. The specific layers will depend on the depth and location of the incision.
There are three layers of embryonic tissue present in the pig. These layers are called the ectoderm, mesoderm and the endoderm.
There are three layers: ectoderm, mesoderm, and endoderm.
Hydra is a multicellular animal with tissue level of organization but has no organs. It has a large surface area in relation to its volume. Being diploblastic, it has two layers of cells in its body. As most of its cells are in direct contact with water, the ectodermal cells exchange gases with external water while endodermal cells with water that comes within the gastro-vascular cavity. For further information, find me on facebook: drubaidchaudhry@yahoo.com/Ubaid Chaudhry
The presence of only two tissues layers makes cnidarians diploblastic. These tissues layers consist of an epidermis (outer layer) and a gastrodermis (inner gut layer). Mesoglea, a type of jelly-like substance is between these layers.