Webhydroid, any member of the invertebrate class Hydrozoa (phylum Cnidaria). Most hydroids inhabit marine environments, but some have invaded freshwater habitats. Hydroids may be either solitary or colonial, and there are about 3,700 known species. Hydroids have three basic life-cycle stages: (1) a tiny free-swimming ciliated planula larva about 1 mm (0.04 … WebDec 15, 2008 · Best Answer Copy The green hydra ( Chlorohydra viridissima) gets its colour from green algae which live inside its tissues in a mutually beneficial relationship. The algae living inside the...
Hydra Movement - YouTube
If Hydra are alarmed or attacked, the tentacles can be retracted to small buds, and the body column itself can be retracted to a small gelatinous sphere. Hydra generally react in the same way regardless of the direction of the stimulus, and this may be due to the simplicity of the nerve nets. Hydra are generally sedentary … See more Hydra is a genus of small freshwater organisms of the phylum Cnidaria and class Hydrozoa. They are native to the temperate and tropical regions. The genus was named by Linnaeus in 1758 after the Hydra, which was the many … See more 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 … See more Hydra mainly feed on aquatic invertebrates such as Daphnia and Cyclops. While feeding, Hydra extend their body to maximum length … See more Hydra has a tubular, radially symmetric body up to 10 mm (0.39 in) long when extended, secured by a simple adhesive foot known as the … See more When food is plentiful, many Hydra reproduce asexually by budding. The buds form from the body wall, grow into miniature adults and break away when mature. See more The species Hydra oligactis is preyed upon by the flatworm Microstomum lineare. See more Hydras undergo morphallaxis (tissue regeneration) when injured or severed. Typically, Hydras will reproduce by just budding off a whole new individual; the bud will occur around two-thirds of the way down the body axis. When a Hydra is cut in half, each half … See more WebSep 18, 2009 · A hydra moves by leaning and putting the tentacles on it's head on the sea floor, and leaning again putting it's body on the sea floor. Thus, it appears to be … thera 400 mcg
Hydra Definition & Meaning - Merriam-Webster
WebHydra definition, a water or marsh serpent with nine heads, each of which, if cut off, grew back as two; Hercules killed this serpent by cauterizing the necks as he cut off the heads. … WebThe young hydra now fixes itself to a substratum and gradually assumes adult characteristics. 9. Regeneration in Hydra: i. Regeneration is the ability to restore lost or worn out parts of the body. The capacity to replace or … WebMay 28, 2011 · its about how hydra moves.i used clay for this purpose. thera3 manual