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In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work mainly like muscular hydrostats. Most forms of tentacles are used for grasping and feeding.
A tentacle is a part of the body of an animal or plant that can move freely. They are like arms. Some invertebrates, like squid, sea anemones or hydras have them. They use the tentacles to catch food, or to grip the sourroundings.
When used in a zoological context, the term tentacle refers to a slender, elongated, flexible organ that grows near the mouth of an animal. Tentacles are most common in invertebrates, although they are present in some vertebrates as well.
Squids have elongated tubular bodies and short compact heads. Two of the 10 arms have developed into long slender tentacles with expanded ends and four rows of suckers with toothed, horny rings. The body of most squids is strengthened by a feathery-shaped internal shell composed of a horny material.
The tentacles are long processes containing blood vessels and are continuous with the body cavity, or coelom. Rows of very thin single-celled units called pinnules are found on the tentacles. The pinnules, which… Read More. bivalves. In bivalve: The nervous system and organs of sensation.
Here’s a pop quiz for you: How many tentacles does an octopus have? If you said “eight,” sorry, but you fail. An octopus does have eight limbs. But technically, they’re known as arms, not tentacles. An octopus is a cephalopod—a group that includes squid, cuttlefish, and nautilus.
tentacle. 1. In many invertebrate animals, a long, slender, flexible structure, often bearing sense receptors, used to obtain information about the immediate environment and often to obtain food. 2. In corals and sea anemones, a movable, tubular extension of the body cavity; tentacles are arranged in a ring around the mouth. 3.
