morphology of a dog 
Articulated limb ending in four toes allowing the dog to move about, dig and scratch.
Pointy corneous appendage, the remnant of a thumb; it does not touch the ground and is often absent on the hind limb.
Thick elastic cutaneous bulge located at the base of the dewclaw; it does not touch the ground.
Terminal end of the limb supporting the body; it is formed of various articulated bones and ends in a claw.
Nonretractable corneous structure that is not very sharp; the dog digs with it and it provides stability and grip.
Thick cutaneous bulge, elastic and resistant to wear upon which the toe rests; it contributes to locomotion and absorbs shocks.
Thick cutaneous bulge, elastic and resistant to wear; it does not touch the ground but prevents the dog from sliding as it lands after a jump.
Thick cutaneous bulge, elastic and resistant to wear supporting the metacarpus; the dog uses it to move about and it absorbs shocks.