From About.com:
Underlying the stifle area is the stifle joint formed between the large hip bone (femur) which is equivalent to our thigh bone and the tibia, equivalent to our shin bone. The stifle joint somewhat resembles a human knee.
The joint between the horse's hock and hip is called the Stifle joint.
this long bone that runs from the hock to the fetlock is called the cannon bone
A horses leg is called a leg, but it has several names for different areas of the leg like cannon, hock and gaskin.
Mike Hock
It is called a capped hock. A horse's hock is the same as a human ankle. Most likely if your horse has a large bump on the top of its hock, it has been injured in some way. On a horse that has not been injured there should be what appears as a small bump on the back of their hock, this is called the point of the hock. I would suggest consulting your vet about any bumps you find on the front of a horse's hock.
Chestnut applies to horses in two ways; one is the color, which is reddish brown. Another is the bony protrusion from above the horses knee in the front, and from the inner hock on the back. This is in no way harmful to horses, it is present on all horses.
The left medial hock refers to the inner side of the left hind leg joint in quadruped animals like horses and cows. It is an important joint for mobility and stability in the animal's hind limbs. Issues with the left medial hock can affect the animal's ability to move properly.
It depends on wich part you are talking about. there are three. The feltlock, the pastern, and the ergot.
For a young horses' joints to fully fuse, it takes 3-5 years. This is why horse racing is very dangerous because the horses are not fully developed. Do not jump/race/work hard with immature horses!
An animal's hock is the joint in the hind leg that is comparable to the human ankle. It is located between the knee and the fetlock joint. In horses, for example, the hock is crucial for mobility and bears a significant amount of weight during movement.
That is for me to know and for you to find out.
Because there is no muscle below the knee/hock to cushion the bones