A dog's physical structure
Dog still maintained the characteristics of meat animals
Since the dog has been kept by humans, slowly evolved into a Cayman
omnivorous animals but it was initially belonging to carnivorous
animals.
Dog's mouth can be very open Zhang, easy to bite the dog's jaw strength
of a strong prey once it is difficult to get rid of bite, the dog
can easily bite and Diao back to weighing 10 kilograms things.
Dog's teeth have also made appropriate form of meat, which incisor
and canine teeth to bite their prey and very easy to tear off the
meat, but also look sharp canine powerful, easy to tear off the
meat cut into small pieces.
However, the dog's jaw can only do so up and down reciprocating
movement, not as slowly as chewing herbivores. To cope with this
sort of a swallow eat, and its digestive system is also gradually
becoming more effective. dog can rely on running and walking Or
a dog can find a foothold, the only fingertip touchdown walking
"means a line of" Animal. It is assumed the original dog
industry and people, must be followed on foot to walk to, but in
order to chase prey, it often requires a long distance run. In order
to reduce fatigue, improve the speed, gradually turned into a fingertip
to the running position.
We tend to our common humanity in the shape of the foot to guess
a dog's feet, thinking that the rear claws of a dog that is its
a heel. In fact, the so-called dog heel, that is located in square
feet known as the "Flying Day" part, that is, the bones
back to the location highlighted.
Forepaw dogs have five toes head, after the claws are the first
four toes, but the thumb can not forepaw to the ground. While the
rear foot toe Although there are some, but has been completely degraded,
they have basically been blind to. This estimate is due to the evolution
of dogs with claws for walking a result, the thumb has become useless.
Dog's paw, unlike cats and other animals, as can shrink up to walk,
has been a long stretch, in fact, this is played a similar role
as spikes, so that the dog running faster.
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Funny dogs 
