Tentacles vs Arms
It would always be interesting to compare and contrast the tentacles and arms as they both sound alike, and at the same time, the differences could also be understood. The information presented here about tentacles and arms are sensible to the reader, as there is specific comparison between the characteristics of the two subjects.
Tentacles
Tentacles are flexible and elongated external processes or organs, found mainly in invertebrate animals. Tentacles are also known as bothridia, and sometimes it is referred to describe the leaves of insectivorous plants. Tentacles are important for animals in feeding, sensing, grasping, and locomotion. Those are well equipped for the particular function or functions. Suckers present on the tentacles of squids and octopus species, so that the grasping of a prey would be easy. The suckers on the tentacles of cephalopods are more powerful in comparison with those in the rest of the molluscs. The small antennae in the snails and slugs are another type of tentacles, which are useful in sensory function or in sensing the environment. The tentacles of Jellyfish are functioning in a fascinating modus operandi, which mainly includes the paralysing of prey animals via venomous shocks from their nematocysts. The magnitude of this method could be very high, as they can sometimes paralyse a shark or large tuna fish. Large colonies of jellyfish make those venomous stingy areas in the sea by having nematocysts on their tentacles. In addition, the specialized tentacles of jellyfish can also perform the capturing and digestion of their food or prey. Despite the presence of tentacles in invertebrates and sometimes in plants, the potencies are always considerable.
Arms
Arms are highly diversified organs, but mainly the forelimbs of animals. Usually, arms are found in both vertebrates and invertebrates. However, the main difference between those is that, the invertebrate arms are more flexible than the vertebrate arms. The arms of primates are particularly interesting, as there are opposable fingers, in vertebrates. Therefore, they can climb on trees using these prehensile appendages. The invertebrate arms mainly include the ones in squids, octopus, and cuttlefish. They all have two arms in each animal. The invertebrate arms have suckers to help grasping food items. The transverse muscles of their arms enable to manipulate finely via bending movements. In addition, the invertebrate arms are useful for them to attach to surfaces while resting. On the other hand, human and other primate arms are equipped with finely moveable fingers. Therefore, the effectiveness of the primate arms is very high. In other words, arms are value added external appendages of animals.
What is the difference between Tentacles and Arms? • Tentacles are usually found among invertebrates and sometimes in certain plants, whereas arms are present in both vertebrate and invertebrate animals. • Tentacles are elongated structures, and the length is always higher in comparison to the arms. • Arms of the invertebrates have suckers along the whole length, but the suckers are found at the tip of tentacles usually. • In case of vertebrate arms, the fingers are very important features, while the suckers and nematocysts are the stand out features of tentacles. • The tentacles of snails and slugs have chemosensory glands, but not in any type of arms do those feelings. • Arms can perform finer and nicer workouts compared to tentacles. • The tentacles mainly used to catch the pray, and the arms active secondarily and assist to gasp the prey in invertebrates. |
it makes no sense calling them arms octopus are invertebrates so calling them arms makes no sense as octopus would need tentacles as you stated in your article that tentacles are more flexible.
that arms are normally found on vertebrates.
since octopus hide under rocks to catch their pray would it not make more sense to have tentacles as they would be more flexible.
text taken from your article
• Tentacles are usually found among invertebrates and sometimes in certain plants, whereas arms are present in both vertebrate and invertebrate animals.
• Tentacles are elongated structures, and the length is always higher in comparison to the arms.
so it would make more sense to call them tentacles.
as ocopus are invertebrates.
That saying they have arms would be like saying they have no sense of danger. that tentacle would be more useful if you are under water. Because they are longer that your article even state that arms are shorter.
if hiding under a rock trying to catch something to eat you would want a long stick.
not short arms.
tentacle are longer so it would make more sense to call them tentacles.Tentacle can move just like arms.
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so would it not make more sense to call them tentacles. not arms when talk about it. Don’t foreget they are invertebrate after all.
octopuses have 8 arms, squid have 8 arms and 2 tentacles.
arms are for manipulating objects using strength and precision.
tentacles are a combination of whiskers and grappling hook.
octopus arms have their own brains to help with problem solving,
similar to how some reflexes in humans never reach the brain,
but are resolved in much less time by the medulla oblongata.
pro tip:
quick way to differentiate, tentacles only have suckers near the end.