What is vase-shaped body of the hydra?

The vase-shaped body of the hydra is a cylindrical structure that serves as its main body, featuring a hollow digestive cavity known as the gastrovascular cavity. This body is typically divided into two regions: the stalk and the oral end, where the mouth and tentacles are located. The hydra's body is composed of two layers of cells, the ectoderm and endoderm, with a jelly-like mesoglea in between, allowing for flexibility and movement in its aquatic environment. This unique shape aids in its feeding and locomotion, enabling the hydra to thrive in freshwater habitats.