Why Do Animals Have Tails And Humans Don’t

Life originated in the sea, so We can say that the tails originate from the sea.

Primitive fish have existed long before land animals. Fish have evolved tails, which they were allowed to move easily through the water (tail wagging pushes forward). Later, the evolution of fish developed lizards, and from lizards have evolved mammals.

In animals with spine, such as, for example a cat, the tail is an extension of the spine. Over time, the tails of different animals have specially adapted to perform different things. Meanwhile, the creatures which the tail did not need (the people), they lost it during evolution.

Do all animals have tails? No. There are a lot of animals that don’t have tail; like guinea pigs, apes, frogs, snails, octopuses…

Do human embryos have tails and gills?

Before it is born, every human embryo re going through some periods of the history of human evolution. At the very beginning, the tiny embryos have gill slits like a fish, our remotest ancestors. And until the fourth week of development, human embryos have a small tail, the rest of our ancestors of mammals. Before gradually disappear, a tiny tail grows about two weeks. Since it remains only fused, bony growths at the end of the spine called the tail bone.

What is the purpose of a tail in animals?

Animals that dig holes usually have a very short tail, long would they only bothered. But animals that climb trees or run on the ground often have a long tail (squirrels, monkeys, tigers, wolves, dogs). Inhabitants of trees, such as squirrels, use the tail to maintain balance on the branches, and as a rudder when jumping through the air from branch to branch.

In some animals, such as, for example, chameleons and spiders monkeys, tail is adapted for catching, meaning that they serve as a reserve hand. Spider monkey can catch branch with tail, and to wrapp tail around it like a rope and completely safe hanging.

Lizard’s tail well serve to distract predators such as snakes, especially when half-lizard went into the hole, and the tail wags on all sides. When predators catch it, the lizard rejects tail, which is struggling on the ground, and so for a moment confuse a predator, and lizard escapes. Later it will simply grow a new one.

Porcupine use its tail as a weapon, placing it so that plunged many sharp spikes in the nose of animals that attack it. Some dinosaurs were its tail bristling with spines used as a mace.

The tail can also be used like body language for communication. Just like a child who joyously leaping, dog frantically wagging his tail showing excitement. Upright tail can mean that the dog is ready for the fight, as when a man clenched his fists to make it look more dangerous. Similarly, folding tail and bending down the head dog says he’s afraid. The cat, however, switch tail back and forth when upset or angry. It can swinging tail from side to side when looking at prey, such as delicious bird that carelessly bouncing around her.

Which animal has the longest tail? Longest tail of all the animals, up to 2.4 m, has a male giraffe. Giraffes also have the longest neck in the animal world.