1. Does anyone know that how many nerves or neurons, the adult brain contain? An adult brain contains about 100 billion nerve cells, or neurons, with branches that connect at more than 100 trillion points. An adult brain contains about 100 billion nerve cells, or neurons, with branches that connect at more than 100 trillion points.

2. Q: Why do we have two eyes? A: We have two eyes because having two eyes increases your angle of vision. It helps you to judge depth. Having two eyes allows us to see 180 degrees and three-dimensional objects.

3. Q: Does anyone know why do we have ears? Ans. We hair because it is used for warmth and also keep you cool down.

4. Does anyone knows if all the animals have eyes? No.. worms don't have eyes and some fish from the depth of the ocean don't. The bats and animals with abnormal eyes, a bats eyes don't see the same as normal eyes they act more like infer red, they rely on senses of echos from there screeches to paint themselves a picture of the environment. The other examples are sponges, cnidarians, rotifers, most mollusks and there so many others.

5. Q: Does anyone know why do we hear? Ans. We have two ears because the sounds hits one ear a fraction of a second before the other and produces stronger vibrations. It helps you tell what direction the sounds come from.

6. Q: Does anyone know why do have fingerprints? Ans. We have fingerprints because they are replacing hair. Wherever there is no hair, there are fingerprints and there is no way that two people’s fingerprints can be same.