HYDROSKELETON Meaning and
Definition
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Hydroskeleton refers to a structural support system found in certain invertebrates, particularly aquatic animals. It is a hydrostatic skeletal system that provides support and maintains the shape of the organism by utilizing the pressure of fluid in its body.
The hydroskeleton consists of a fluid-filled cavity called the coelom, which is surrounded by muscular tissues. The coelom is filled with a watery fluid, often blood-like in composition, which acts as a skeleton by supporting the soft tissues of the organism. The pressure of this fluid creates an internal force, allowing the organism to maintain its shape and execute movements.
In hydrostatic support, the muscles surrounding the coelom contract or relax, causing the fluid inside to move, resulting in changes in the organism's body shape. This system enables hydrostatic invertebrates such as worms, jellyfish, and some species of cnidarians to move and perform various activities like swimming, burrowing, or extending appendages.
The efficacy of hydroskeletons is evident in the flexibility and adaptability they offer to these organisms. They can change shape and move easily through water or other liquid environments. Additionally, the fluid within the hydroskeleton can adjust and equalize pressure throughout the body, helping in maintaining stability and preventing collapses.
Overall, the hydroskeleton is a remarkable adaptation that allows certain invertebrates to thrive in their aquatic habitats, providing essential support, mobility, and protection for these organisms.
Etymology of HYDROSKELETON
The word "hydroskeleton" is composed of two parts: "hydro" and "skeleton".
The prefix "hydro-" comes from the Greek word "hydor" (ὕδωρ), meaning "water". It is often used to refer to anything related to water. In this case, it indicates that the structure being described is related to water.
The term "skeleton" comes from the Greek word "skeletos" (σκελετός), which means "dried up" or "dried body". In the context of biology, it refers to the rigid framework or structure that supports and gives shape to an organism.
Therefore, the word "hydroskeleton" combines these two parts to describe a structural system found in some organisms, particularly in certain invertebrates, where the support and shape are provided by a body filled with water or a fluid.
