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Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria.They are native to the temperate and tropical regions. [2] [3] The genus was named by Linnaeus in 1758 after the Hydra, which was the many-headed beast of myth defeated by Heracles, as when the animal has a part severed, it will regenerate much like the mythical hydra's heads.
Although Hydra are sessile, they can move in short bursts. An individual can extend and contract with a mixture of muscle movement and water (hydraulic) pressure created inside the digestive cavity. Tiny cells that line the digestive system possess flagella which create a current to draw water into the digestive cavity. These cells can extend ...
Hydra oligactis, also known as the brown hydra, is a species of hydra found widely dispersed in the northern temperate zone. It is a common organism found in still waters from early Spring to late Autumn. It is commonly found attached to the stems of water plants, the undersides of leaves, submerged twigs and on the surface of stones. When ...
Between 1801 and 1820, Poiteau and Turpin created an extensive album of botanical drawings, featuring 147 original pieces. These illustrations depicted a vast array of European and exotic plants, often accompanied by detailed annotations on plant anatomy, including flowers, leaves, seeds, and fruits at various stages of development.
Bahasa Indonesia: Diagram skematik pembangkit listrik tenaga air (PLTA) English : Schematic diagram of Hydroelectric power plant Español : Recorrido del agua dentro de una central hidroeléctrica
Like other hydras, Hydra vulgaris cling to a base object with a "foot" pad, shaped like a disk. The Hydra moves by releasing its grip on its base and is carried away by the current. H. vulgaris can also move by bending over, grabbing a surface with its tentacles, releasing its grip with its "foot" and flipping over itself.
The scheduling and dispatch of the Tehri Hydro Power plant is done by Northern Regional Load Dispatch Center (NRLDC), which is the apex body to ensure the integrated operation of the power system grid in the Northern region and comes under Power System Operation Corporation Limited (POSOCO). At present, THDC India Ltd. is generating around ...
A schematic presentation of a gravitation water vortex power plant, showing the turbine in yellow. The gravitation water vortex power plant is a type of micro hydro vortex turbine system which converts energy in a moving fluid to rotational energy using a low hydraulic head of 0.7–3 metres (2 ft 4 in – 9 ft 10 in). This technology is based ...