why human being has two ears and one mouth?

Answer 1

Humans have two ears to allow for the use of sound to identify where and how far away something making the sound is. (Similar to echolocation, which humans can use, albeit somewhat crudely. More on that in a second.) Having two ears allows the same sound to enter in both but at slightly different times, and your brain uses the two different inputs to determine which direction the sound is coming from. As mentioned the prime example of this is echolocation, of which bats are the most popular example. They emit a sound which will bounce off of their prey and to their ears, and using the 'echo' from that they are able to determine where their prey is. Their ability is so honed that they can locate and capture tiny flying insects in while they're both in flight!

The same theory of two different input points applies with having two eyes. Two eyes allows us to have 'depth perception'; the ability to judge how far away something is by sight. Close one eye and you'll find it much more difficult to tell how far away something truly is. Alternate opening and closing your eyes (so one is always open and one is always closed), and you'll see two different angles of whatever you're looking at. Your brain automatically merges these images so you only see one, and having these two combined images is what allows you to determine how far away something is. Same thing with sound, cover one ear and you will find that sound 'surrounds' you, but you'll find it much harder to tell where it's coming from unless you turn your head around until your open ear is facing the source of the noise.

As for the one mouth, we really only need one. Just imagine how interesting a feast would be with two, though...

Answer 2

Good ***** It's pretty basic if you thing about it. 1st 2 eyes give you a thing call "Depth Preception". In fact the our eyes are in the front of the face is to aid in "Depth Preception" It's theorized we have depth preception because we hunt. Most preditor animal have two eyes facing forward. Most herd animals have it on the side of the head. Herd animal really don't need to know how close the hunter is, just that he's coming so being able to look in a larger arch is important. Hunter need to judge depth to target weapons and claws to bring down the prey. 2. Two ears, again it helps with location and depth preception by sound. You can sneak up on people who have lost their hearing in one ear but it's alot harder if they have both. 3. Two holes allows the the passage of enough air. So why not one big hole, easier to get clogged. Same can be said if the holes are two small. Hence why we most likely don't have ten small holes. 4. What advantage to having a second mouth? It's more likely to cause problems, especiall since it requires alot of muscle and specialed joints. A mouth is complicated and thus more likely to have something go wrong, so you really don't want to complicate it more by adding another one. All the other sense are made mostly from a hole in the skull and cartalage. Pretty easy stuff and not alot of moving parts.

Answer 3

imagine if humans had 2 mouths and 1 ear it will be more like punishment for that 1ear to transmit messages from the 2mouths.,worse if the 2 mouths are talking at the same time.
humans have 1mouth and 2 ears so that they can hear more and talk less.however, most people are doing the opposite.

Answer 4

As opposed to what?

Don't forget that the reason we have two ears and one mouth is basically because all vertebrates have such a bodyplan.

Two ears give stereo sound and the ability to tell which direction a sound is coming from so we can use it to avoid predators and one mouth presumable because its the most efficient design. Some primitive (i use the word in its technical sense) have a 2 way digestion system rather than the in and out cycle we use.

Answer 5

We have two ears - one on each side of our head. Having our ears placed this way helps us hear everything around us. If we only had one ear, we'd have to turn it toward the sounds we wanted to hear. We only need one mouth to allow us to eat.

Answer 6

Two ears are required to pinpoint the location of a sound in 3-D space, just as two eyes are required to pinpoint the position of an object in 3-D space.

One mouth is required for entrance of food into the digestive system. There is no need for more than one.

Answer 7

2 ears so u can hear form both directions. one mouth cuz thats all u really need to talk and eat

Answer 8

You have to ears to give the precise location of where noise/ sound is coming from just like we have two eyes to enable us to have depth perception. we don't need 2months so nature has not evolved it!

Answer 9

WHY? do you think we should have two mouths and one ear??? what a silly question.

Answer 10

two ears to hear all around him and one mouth because.....one is all you need!