Dec 13, 2016 · Hydra tentacles contain special cells called cnidocytes, which house a stinging structure known as nematocysts. Nematocysts snare and inject a toxin into the hydra's prey, which leaves them...

Hydra are a genus of small, fresh-water organisms that are classified under the phylum Cnidaria. In addition to being related to such organisms as jellyfish, they are characterized by their tiny, tube-shaped bodies that contain several tentacles on one end.

Hydra live amongst this microscopic environment and are thought to be early ancestors of corals and jellyfish. Hydra are multicellular predatory organisms that can grow up to 30 millimeters, which is barely visible to the naked eye. As members of the phylum Cnidaria, hydra distinctly have tentacles and a single tubular opening.

Hydra is an extremely interesting animal to observe with a microscope and has several features that make it suitable for studying regeneration and aging. The organism can be found in pond water and different species can be distinguished based on the presence or absence of symbiotic algae, morphology of their cnidocytes and the pattern of ...

Jun 5, 2014 · Hydra tentacles captured at 400x magnification under the microscope. Hydra extend their body to maximum length when feeding and slowly extend their tentacles. Upon contact with prey, the nematocysts on the tentacle fire into the prey while the tentacles coil around the prey.

Use the compound microscope to study stained commercially prepared slides of cross and longitudinal sections of Hydra. Use the scanning lens to search the slide and locate the longitudinal section. Once found, use 100X to begin your study.

Hydra is a small genus of small, fresh-water organisms of the phylum Cnidaria. Biologists are interested in Hydra because of their regenerative ability, they do not appear to die of old age, or to age at all! Hydra have a tubular body up to 10mm long when extended.

A whole live green hydra (Phylum Cnidaria, class Hydrozoa, genus Hydra) seen under a light microscope with no staining or artificial coloring. The hydra is still alive, and has extended its 7 tentacles (cnidae) which are lined with stinging cells (cnidocytes, visible as the bumps on the tentacles) that produce nematocysts.

Identify the key anatomical features of a hydra under the microscope. Count the tentacles and observe budding structures on a hydra specimen. Understand the basic characteristics of hydra and its reproductive processes.

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