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.
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no,hydra have no organ
how do hydra move
Any animal that breathes has a respiratory organ
the type of respiratory organ mollusks have is GILLS.
the primary respiratory organ for cockroach is trachea
Compared to what? It is the only respiratory organ in humans.
lungs is respiratory organ of cow
No, it's in the ear.
The lungs
The Lungs.
The lungs are the main organ of the respiratory system, but they are also an organ in the circulatory system.
The respiratory system.