No! Camels have what is called the stifle joint, the equivalent joint to the human knee, in each hind limb. In the front limb, what is colloquially referred to as the 'knee' in animals such as horses and camels is actually the carpus, the equivalent to the human wrist - not a true knee!
Note: the joint down from the stifle (the one which bends in the opposite direction to a human knee) is called the hock or tarsus and is the equivalent of the human ankle.
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― Mahatma Gandhi