High level altitude can affect the survival of humans in a bad way, due to the high altutude's air pressure is about 30 percent lower because of the atmosphere is less dense. Which mean that the air molecules are farther apart. Hypoxia or oxygen deprivation is the result of being exposed to high altitude dud to the air pressure is lower it makes it more difficult to allow oxygen to enter our vascular systems. The effects of the Hypoxia on  a human body are, lack of physical activities, appetite, distorted vision, and difficulty with memorizing and thinking coherent. Our bodies are very sensitive, for if your not able to adequately adjust to the new altitudes your body might warn you by developing some symptoms warning you to go back to sea level.

Acclimatizing occurs to our body when it needs to adapt to high altitudes. Acclimatizing is where our bodies produce more red blood cells and capillaries to carry more oxygen. Due to this processour lungs tend to grow in oder to allow the osmosis of oxygen and carbon dioxide.

A facultative adaptation that our bodies do when going into higher altitudes is producing more hemoglobin to carry oxygen throughout our bodies. In order to do this you would need to take an IRON vitamin. Iron produces hemoglobin. In doing this you are helping your body acclimate to high altitudes by not stressing the body to much to produce more blood cells and capillaries to carry the oxygen.

They're humans that develop through genetics the ability to withstand high altitudes better than others. for instance the indians in the high mountains of peru and bloivia are known to be able to produce more hemoglobin in their blood and increase their lung expansion, but they are not the only ones. Alot of people around the world have been able to adapt to certain altitudes though they are some castrophe leading to death.