Human Variation & Race

 1. 

High-altitude conditions are difficult on the human body by definition because air pressure is lower and less oxygen is taken into the body with each breath. The condition is known as "hypoxia," and it results in destabilization of internal body conditions, or homeostasis. Hypoxia damages the brain, muscles, and organs, which need oxygen to work properly. If one has not sufficient of it, people develop such as dizziness, drowsiness, shortness of breath, or confusion. Worse still are high-altitude pulmonary edema (lavage in the lung) or high-altitude cerebral edema (swelling of the brain), which, if not treated, kill. They show themselves in the way that the body is working to deliver enough oxygen to keep processes at a standard rate, and it creates a fatal imbalance within the internal processes of the body.

2. 

One of the very first things that your body is going to do when you are traveling to a high altitude is breathe more rapidly. This is a quick adjustment and will enable your body to adjust to the reality that there is a lower amount of oxygen in the air. Your body will breathe automatically faster so that you are getting a higher level of oxygen with every breath. It doesn't change your genes or any other part of you that are already set—it's your body's effort to catch up for it at the moment. Your breathing will adjust quickly as soon as you move down to lower altitudes. That's the quick action of the body for keeping everything in balance, or homeostasis, with less oxygen available in the air. 

The longer one is at high altitude, the more the body starts to adapt in an even more extreme way than just with more heightened respiration. One form of facultative adaptation to high altitude is when the body can produce increased numbers of red blood cells. This means there is more oxygen present throughout the body because oxygen is so limited in thin air. It's not a genetically determined adaptation, but it's not just more shallow breathing. It's actually a genetic "switch" being thrown by the body that tells the body to make more hemoglobin and red blood cells. The adaptation also started some days or weeks prior and continues as long as the person stays at high altitude. And if he does go back to sea level, his red blood cell level will normalize again eventually. So it's not permanent, but it's a more permanent solution than a temporary solution. 

People born and dwelling at high altitudes like the Andes, Himalayas, or Ethiopian Highlands have larger chests and more lung capacity than individuals residing at sea levels. It is an adaptive expansion, i.e., something that occurs in childhood as the body grows up under low-oxygen conditions. These are not something a human being can just develop later in life by merely moving to high altitude—only if the body comes to be structured in this manner over a really extended period of time. These physical traits enable them to breathe more air per breath and raise their oxygen intake in order to better provide homeostasis in a region where oxygen is less readily available. This adaptation is inherited from one generation to the next and is seen more often in populations where people have inhabited high-altitude sites for an extended period. 

Human beings also acclimatize to high altitude at the cultural level, such as tools, behavior, and adaptive developments. A good example of an adaptive development is the use of oxygen tanks or bottled oxygen by climbers, aviators, or visitors traveling to high altitude. The equipment helps people to avoid the injurious effects of hypoxia if their bodies are not adapted to low oxygen naturally. The second type of cultural adaptation is high-altitude training for athletes, in which the athletes purposefully train at altitude so they can build up endurance and red blood cell counts so that they will perform well when competing at sea level. This culturing of the body in the environment makes performance better while keeping them healthy without changing the body permanently. These are a few of the methods in which humans use technology and knowledge to make advances that evolution might not be quick enough to support. 

3. 

An understanding of human variability along environmental clines is actually most important because it's a reminder that bodies of individuals are variable as an outcome of the in and why they've changed over time in different circumstances—not because of race, but because of the environments in which they adapted. It's a consideration that takes account of actual biological and environmental explanations and not stereotypes or discredited race ideas. If we take the features like skin colour, shape of the body, or lung capacity compared to climates or altitudes, then we notice that human beings are extremely flexible and resourceful in their capacity to figure out means of coping with their environment.
One area that this data is actually useful in is medicine. If physicians know, for example, that people living in the high-altitude regions of the world have more red blood cells, they will be able to comprehend why patients from there react differently to the same operation or treatment with oxygen. This kind of data can lead to better, more precise medicine. Not only would it be fascinating—it can save lives and eliminate health inequities by detecting real, physiological differences instead of assuming people are all the same or being based upon racial categories that lack biological significance.

4. 

In fairness, I believe that race is not a significant factor in why we see the adaptations that we do in people who live at high altitudes. Race is a social construction, not a biological one. The racial categories that we use—Black, White, Asian, etc.—are too general and quite simply do not have much to do with why particular adaptations will take place. For example, people who dwell in the Himalayas of Asia, the Andes of South America, and the highlands of Africa in Ethiopia have the same high-altitude adaptations, like greater lung capacity or greater red blood cells. But they are each a different "race," so race is not responsible for the similarity. In reality, it is their shared environment—high altitude, low oxygen levels—that causes these traits. It is something that race cannot explain.
Even when people try to link characteristics to race, it is actually not accurate and can even harm. It makes people stereotype or assume things about individuals by their looks instead of the way their body has adapted to where they are. To explore environmental pressures is far more scientific and beneficial because it's all about actual conditions that shape human biology. It teaches us about people in terms of their lived contexts and experiences, rather than skin tone or facial structure. Overall, therefore, learning about human variation as clines and adaptation provides us with improved, more accurate reasons for being different—and for why being different is a good thing.