Skip to main content


How Do We Communicate? And what is Sign Language?


There are a lot of ways to communicate: speaking, singing clapping hooting. Even animals communicate with one another in ways different from the humans. Only humans can express their thoughts and feelings in words because of our superior brain. Both humans and animals also communicate through body language. Sometimes, we don't use words but make gestures like traffic signs or simple movements of the hand in order to communicate.


Why can humans speak, but not animals?

A lot of organs such as lungs, larynx, mouth, pharynx, tongue, teeth, and brain participate in the speaking process. Although animals possess all these organs, their structure is different from that in the humans. For speaking, it is important to properly control the processes involved, mainly breathing. This is done for us by our brain. First the air is inhaled, and then deviated through to the larynx from the lungs. The larynx has small muscles called the vocal cords. When the air passes through the stretched elastic vocal folds it causes them to vibrate, producing sound. The teeth tongue and lips then form the words.


How do animals communicate?

Dogs bark, growl, whine. Deer bell, mice squeak. When a bee has detected food, it informs the other bees by some kind of a dance, and whales inform each other by the means of the whale songs. Their sounds can be heard in water from several hundred kilometers. The communication of the whales has increasingly become difficult, because there are so many other sounds in the ocean now, like those of ships and the oil rigs. In general, animals of the same species communicate with one another without a problem; between species, there could be misunderstandings! For example, a cat purrs with satisfaction, but the dog may think that the cat is snarling at it.


How do our hands communicate with the brain?

The hands are connected to the brain through nerve paths. If it becomes very cold for the nerve endings in the skin of the hand, the signals are transmitted to the brain. In the brain, a process is initiated that leads to commands: rub the hands, put the hands in the armpits to warm them, wear gloves. The brain sends these commands back to the hands via the nerves, and the hands then execute them. In case of an accident, like a fall, we react much faster and try to prevent the fall using our hands. How fast we react depends oh whether we have already experienced such situations before.


What do traffic signs tell us?

On many signs there is a text telling us what to do: ‘Exit’, ‘Diversion’, and ‘Parking’. People who cannot read the text of the signs can understand them through the figures or pictures. For instance, the shape of the arrow on the signs for exit helps understand the direction of the exit. Some signs convey information by means of picture: ‘Pedestrian Crossing’ and ‘Play Street’ are some examples. Then there are signs that look the same in all countries, such as the sign of ‘Man Road’ and ‘Give Away’. One can always understand a ‘STOP’ sign even if it is written in Arabic!


What is body language?

Both humans and animals communicate a lot through their body postures. A cat, when angry, humps its back and its skin ruffles up so that it appears bigger and more dangerous. In this way, it warns its opponents not to come near. Humans frown when in doubt and smile when happy. We use the thumbs up or the thumbs down sign as common gestures of approval or disapproval by extending the thumb upward or downward. We also make use of a universal sign language: we know what an index finger on the lips or a waving hand is trying to tell us. But watch out: signs do not mean the same all over the world- if you make an ‘O’ with the index and the thumb, it means ‘okay’ in the USA, but at other places it is an insult.



  1. Totally Amazed!!! Great effort 👏

  2. I dnt hv words now its just wowww 🔥❤️

    1. Thank you so much Janvi!
      Keep visiting!😇😇😇

  3. Amazing work brother 😍🥰

    1. Thanks a lot !!
      Visit again!😇😇😇😇😇😇

  4. Great post... I love reading here

    1. Thank you so much!
      That means a lot!
      keep visiting!


Post a Comment

Popular posts from this blog

Is Our Brain Bigger Than That of the Dinosaurs?

  What Differentiates Humans from Animals Biologists classify humans as animals and part of the animal kingdom. Like our nearest relatives, the apes, humans are also mammals. Humans have evolved from apes, but there are features that differentiate us from other animals- including apes. These include the upright walk, our opposable thumb, our special ability to communicate by a language, and our highly developed brain. Our brain allowed our ancestors, like the Neanderthals , to invent tools.   Did humans evolve from apes? Today, one can think of humans and apes as cousins. They have common ancestors, but have not descended directly from each other. About 5-7 million years ago, a line of man-like apes grew apart, and evolved independently of the other apes. The oldest, almost completely intact skeleton of an upright ancestor of human- the Australopithecus - was found in 1974 in Ethiopia (Africa). The scientists named it ‘ Lucy’ .   Do animals use tools? Animals do make use o

Why are we thrown forward when brakes are applied?

  Objects fall because the mass of the Earth attracts them. The force that pulls us towards the center of the Earth is known as gravitation. It keeps us on the ground and the satellites in their orbits. This force of attraction is much less on the Moon than on the Earth-only one-sixth. For this reason, the astronauts bounce when they walk on the moon because they experience weightlessness. In the state of weightlessness, we do not feel any force of gravity and do not feel any weight. However, we feel the forces acting on us on the Earth, when we fall from a height or when we are thrown forward when brakes are applied.   What is mass, weight, and density? All objects have a mass. Because of the force of attraction on the Earth, an object has a weight. This is the force with which the body-that is, the mass of the body-is attracted. The force of gravity on the Moon is just one-sixth of that on the Earth. A person who weighs 60 kg on the Earth weighs only 10 kg on the Moon. The dens