A balloon filled with water.
They are supported by their hydroskeleton.
Hydroskeleton
hydroskeleton
A hydroskeleton works by using fluid-filled cavities surrounded by muscles to create support and movement. When the muscles contract, they apply pressure to the fluid, causing the structure to stiffen and move, providing support for the organism. This system is commonly seen in invertebrates like jellyfish and earthworms.
In a hydroskeleton, muscles are arranged in concentric layers around a fluid-filled cavity. Contraction of these muscles causes movement by changing the pressure of the fluid inside the cavity, similar to a hydraulic system. This arrangement provides structure and support while allowing for flexibility and movement.
A hydroskeleton, or hydrostatic skeleton, is a structural support system found in certain animals, particularly in soft-bodied organisms like jellyfish, worms, and some mollusks. It relies on the pressure of fluid within a body cavity to maintain shape and enable movement. When the fluid is contained within a flexible outer membrane, it allows the organism to change shape and move by contracting and relaxing muscles. This system is crucial for locomotion and provides support without the rigidity of a traditional skeleton.
The examples are tire ,ballon ,and beachball and the non-examples are shoe,chair,and bed
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