hematopoiesis. (physiology). The process by which the cellular elements of the blood are formed.ematopoiesis. (physiology). The process by which the cellular elements of the blood are formed.
This is why Everest climbers typically make several trips up and down the mountain to increasingly high elevation camps to acclimate their bodies to high altitude conditions. Other risks to Everest climbers include frostbite and hypothermia from the extreme temperatures, thrombosis or embolisms caused by thickening of blood in response to high altitude, extreme sunburn, and broken bones from falls.
Acute mountain sickness is caused by a lack of oxygen in the body of individuals exposed to higher elevations. This usually occurs when they travel to an altitude over 10,000 feet (3,000 metres) without proper acclimatisation before engaging in physical activities. Mountain climbers, trekkers, skiers, and travellers to the Andes or Himalayas etc. are at greatest risk.