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The nervous system of Hydra is a nerve net, which is structurally simple compared to more derived animal nervous systems. Hydra does not have a recognizable brain or true muscles. Nerve nets connect sensory photoreceptors and touch-sensitive nerve cells located in the body wall and tentacles. The structure of the nerve net has two levels:
The Hydra, a fictional deity created by Henry Kuttner. Mother Hydra, the co-ruler of the Deep One race in the Cthulhu Mythos; The Hydra, a fictional fighter jet in Grand Theft Auto: San Andreas and Grand Theft Auto Online; The Hydra, a fictional machine in Kirby Air Ride; Hydra, a boss enemy in the video game Prototype 2
The Lernaean Hydra or Hydra of Lerna (Ancient Greek: Λερναῖα ὕδρα, romanized: Lernaîa Húdrā), more often known simply as the Hydra, is a serpentine lake monster in Greek mythology and Roman mythology. Its lair was the lake of Lerna in the Argolid, which was also the site of the myth of the Danaïdes.
The term's origins are found in its two syllables: Latin (archia) or the Greek ἄρχειν (archein) meaning “the rule of" [2] and the Ancient Greek ῠ̔́δρη (húdrē) Ionic or hīdrə (hudra) meaning "water snake," as defined by the Oxford English Dictionary. [3] Hydra, also applies the Greek mythological sea monster representation ...
Hydrangea (/ h aɪ ˈ d r eɪ n dʒ ə / [3] [4] or / h aɪ ˈ d r eɪ n dʒ i ə / [5]), commonly named the hortensia, is a genus of more than 70 species of flowering plants native to Asia and the Americas.
The serpent Hydra is a star constellation representing either the serpent thrown angrily into the sky by Apollo or the Lernaean Hydra as defeated by Heracles for one of his Twelve Labors. The constellation Serpens represents a snake being tamed by Ophiuchus the snake-handler, another constellation. The most probable interpretation is that ...
Hydra oligactis. This species can reproduce in three ways: sexual reproduction, budding, and indirectly through regeneration. [11] When hydra reproduce sexually, simple testes, ovaries, or both will develop on the bodies of an individual. Sperm released into the environment by the testes enters the egg within the ovary.
Hydra has one bright binary star, Epsilon Hydrae, which is difficult to split in amateur telescopes; it has a period of 1000 years and is 135 light-years from Earth. [7] The primary is a yellow star of magnitude 3.4 and the secondary is a blue star of magnitude 6.7. However, there are several dimmer double stars and binary stars in Hydra.