[DOC] [TLE] Human Biological Adaptability: Adapting to High Altitude [PAR] First, there are the alternating daily extremes of climate that often range from hot, 
... blood. At high altitudes, the lower air pressure makes it more difficult for oxygen 
to enter our ... These are stressful changes, especially for people with weak 
hearts. ... to high altitude, the body usually has more red blood cells and greater 
lung... [DOC] [TLE] Altitude training - Wikipedia [PAR] Altitude training is the practice by some endurance athletes of training for several 
weeks at high ... Some athletes live permanently at high altitude, only returning to 
sea level to ... Studies examining the live-high, train-low theory have produced 
varied ... Opponents of altitude training argue that an athlete's red blood cell... [DOC] [TLE] polycythemia vera - The Worlds of David Darling [PAR] If you have PV, your bone marrow produces too many red blood cells, but it ... 
With PV, thicker than normal blood slows down the flow of blood to all parts of ... 
Long-term lack of oxygen can cause your body to produce more of the ... People 
who smoke, spend long hours at high altitudes (such as ... Arterial blood gas test. [DOC] [TLE] High Altitude Pulmonary Hypertension: Effects of Altitude, Effects of ... [PAR] Aug 1, 2016 ... Many people live at high altitude and perform normal activities. ... live more than 
2500 m above sea level; of these, 80 million live in Asia, ... oxygen transport 
system to increase the amount of oxygen delivered. ... A 32% decrease in 
coronary blood flow has been observed after 10 days at 3100 m (10,200 ft). [DOC] [TLE] Visionlearning | Inside Science | Fabiola Len-Velarde [PAR] The air has less oxygen at high altitudes, and the physiology of the body changes 
... so that the blood can deliver enough oxygen to body tissues to maintain life. ... 
peak of Everest and other high mountains, or more often they died trying to get 
down. ... People who live high in the mountains have _____ red blood cells than
... [DOC] [TLE] The Circulatory System - Biology Questions [PAR] A closed circulatory system is more efficient. Since blood circulates only inside 
blood vessels, it has a higher pressure and, ... out gas exchange separately from 
circulation) are generally slower and have a ... Capillaries are small blood 
vessels that carry out the exchange of substances between the blood and body 
tissues. [DOC] [TLE] Human Physiology/Blood physiology - Wikibooks, open books for an ... [PAR] Most of the carbon dioxide combines with water and is carried in the plasma as ... 
Formed cellular elements (red and white blood cells, and platelets) which ... than 
inside the cells, blood would be so "thick" that the heart would have a difficult ..... 
Physiologic polycythemia occurs in individuals living at high altitudes (4275 to... [DOC] [TLE] Evolving altitude aptitude - Understanding Evolution [PAR] Oct 12, 2010 ... Tibetan highlanders have no trouble living at 13,000 feet year in year out, and ... 
of Mount Everest without the supplementary oxygen most people require. ... basis 
for high altitude adaptation in populations of Tibetan highlanders. ... It turns out 
that extra red blood cells make blood thicker  more like honey... [DOC] [TLE] Chapter 42 - Circulation and Gas Exchange | CourseNotes [PAR] A body wall only two cells thick encloses a central gastrovascular cavity that 
serves for ... The closed circulatory system of humans and other vertebrates is 
often called ... In general, animals with high metabolic rates have more complex 
circulatory ... Double circulation restores pressure to the systemic circuit after 
blood has... [DOC] [TLE] Blood | How Blood Works in our Body | Blood Diseases | Blood Groups [PAR] Blood fights infections, keeps our body temperature the same and carries ... 
Platelets are tiny bodies that are much smaller than red blood cells. ... The 
amount of blood in your body depends on your size, weight and the altitude at 
which you live. ... People who live in high areas where the air is thinner need 
more blood to... [DOC] [TLE] hypoxia facts, information, pictures

Question: People who live at high altitudes often have thicker blood, to deliver more of this gas to body cells
Answer: oxygen