MarijaAndreevakl

Yaks are specially adapted to high altitudes, with a huge lung capacity and small red blood cells.
Native originally to Tibet, these giant oxen-like animals live at high altitudes in the Himalayas (4,000–6,000 metres). They are specifically adapted to the low oxygen levels with a lung capacity that is ~3 times that of normal cattle, and have smaller red blood cells to improve oxygen transport.

Duck-billed platypus don’t have ni***es, instead they concentrate milk to their belly and feed their young by sweating it out.
The milk emerges from pores in the skin of the abdomen which the platypus puggles then lap up.