which animal has 4 knees?

Answer 1

Mistress is right.

when we look at quadrupeds, what we see is very confusing, because the length ratios between the different parts of the bones are much different from ours. for instance, if you look at a dog's hind leg, it would appear that it's knee bends backwards, but what you are really looking at is it's ankle: dog's femurs are much shorter than ours, so they almost "hide" in their fur.

The same is true with the front legs of other quadrupeds. Look at this picture of a deer: http://www.exzooberance.com/virtual%20zoo/they%20walk/deer/White-Tailed%20Deer%20104024.jpg

At first, one would think that the deer is sticking it's front leg knee out the furthest, but if you look at it's bone structure, you will find that what appears to be his knee is much more like a wrist (with the hoof being the "fingers" and the bend closest to the deers body being the "elbow")

Elephant front legs (http://www.elephant-village-pattaya.com/images/Elephant.jpg)
in comparison to deer front legs, look remarkably like a human's (as side from the giant foot and grey wrinkly skin and ... well you know.). Elephants (and rhino's too I believe) are the only quadrupeds that truly have 4 "knees" when comparing their anatomy to a Human's anatomy.

Answer 2

There are thousands of 4 legged animals. They all have 4 knees.

Answer 3

I think he means four forward bending knees and that would be an elephant.

Answer 4

Elephant.

Answer 5

All quadrupeds ; horses ,cow

Answer 6

hundreds of them...