He is called "yak" in Tibetan, and the name has been transferred to most European languages.
They may grow so long as to touch the ground as the yak walks.
Even the ropes which sustain the tents are made of yak's wool.
In Thibet the yak is, perhaps, the most useful animal to be found in the country.
Like the European Bison, the skeleton of the Yak has fourteen pairs of ribs.