The hand and forearm blood flow of the Eskimo has been found to be greater than that of a control group of white persons in a temperate climate both at rest at an ambient temperature of 20 C. and during acute cold exposure. Under cold stress, rectal temperature was better maintained in the Eskimos, though certain deep muscle temperatures fell more than they did in the white men because of the greater blood flow through exposed parts. The Eskimos showed an elevation of basal metabolic rate and of plasma and total red cell volume. There are similarities between the circulatory changes found in the Eskimo and those found in hyperthyroidism\nThink along the lines of vasodilation, vasoconstriction \ncounter current exchange
121049
Adaptation? Evolution?
363194
the circulatory system (ie the blood circulatory system) can maintain the temperature of the body by vaso-dilation and vaso constriction of the blood vessels ( both deepseated and superficial) when there is cold or the weather is hot respectively.
155567
One difference we have in comparison with a lot of other mammals is that we have a lot of sweat glands in our skin. They help to prevent our bodies from overheating, especially during exercise. As sweat cooling your body works best if the air on your skin can move easily (and especially if a breeze of air is blowing) I would guess that fur/hair would decrease the efficiency of this cooling system a lot. As humans are supposed to have evolved in warm areas of Afrika, protection from cold was not an issue for keeping hair. And protection from sunburn - as a upright walking species we kept our hair on the place where sunburn would be most of a problem. \nThat's my guess, so that may not be true, but I read not too long ago that sweating allows humans to exercise much longer without overheating than a lot of animals (and so hunt an animal to its heat exhaustion, despite if may be able to run faster), if you look up these studies you may find more.\nPS. I found at least one source for that theory, I added it below
625343
Have your diet contain mostly nonfat items, like bread, fruits, vegetables, juices and the like.  Stay away from meats & cheeses , and so forth.\nThe Eskimos eat a lot of meat and  fat.\nNear the equator. the diet is fruit and vegetable based.\nGood luck\nHope
142953
I DON'T KNOW WHAT STATE YOU ARE IN, BUT YOU ALWAYS WANT TO MAKE SURE THAT YOUR HANDS ARE ALWAYS WARM.  IF THEY ARE COLD, THEN THE BLOOD DOESN'T CIRCULATE RIGHT THEN YOUR GRIP ISN'T THE BEST.  THAT IS ALL THAT I CAN GIVE YOU BECAUSE I WOULD HAVE TO BE THERE TO SHOW YOU HOW TO BE AS GOOD AS ME....OH, A TIP FOR YOU-- ALWAYS CHECK YOUR SPELLING!!!
492639
the blood flow changes its direction in a handstand, due to which, the fresh blood rushes to your brain and that is good for mental health, this kinda shakes the blood in the whole body which is good for growth and entire health as a whole.\nthnx
120480
"Eskimo" is an American Indian word which translates to "eater of raw meat". Ironically, scientists put the Indians in a separate anthropological category while the Eskimos are considered more closely related to the natives of northern Asia. The people we call Eskimos originally came from Asia across a land bridge (which no long exists) into northern North America (now call Alaska). They gradually spread across the Artic regions. There are approximately 1,500 Eskimos living in the Soviet Union and about 50,000 in Greenland.
159501
In the Verkhoyansk Mountains of northeast Siberia, Eveny nomads are on \nthe move*. Teams of reindeer pull caravans of sledges down the steep slide \nof a frozen mountain river. Bells tinkle on the lead reindeer while dogs on \nshort leashes dive closely alongside through the snow like dolphins beside a \nboat. One man sits on the lead sledge of each caravan, his right foot \nstretched out in front of him and his left foot resting on the runner ready to \nfend off hidden rocks and snagging roots. Passengers or cargo sit on the \nsledges behind. The passage of each caravan is visible from afar by a cloud \nof frozen reindeer breath.\nThis is the coldest inhabited place on earth, with winter \ntemperatures falling to −96°F (−71°C). The ice is a condition of the water for \neight months of the year and by January it is 6 feet thick.
125313
yes, males have slightly higher volumes in their hearts and a slightly lower pulse rate. Sorry no sources, ask a nurse.
314231
LOL, funny things what ya body does dont ya think!\nThe hair grows faster because the skin cells that react to the coldness of the atmosphere, then the hair cell inside the skin cell starts sprouting triggerd because of the nerves. The hair isnt is to keep your skin and nervous cells warm. \nHey and not just in antartica dude!\nI hope this helped you. \nKind Regards, Timothy H. (Age 12, W.A.)
76270
Question: As a child did you ever run a really high temp? My brother ran a sudden high fever(cause never found, of 105 and soaring)that nearly killed him. He was wrapped in towels and buried in a tub of ice to bring the fever down. But while waiting on the ice to be brought he was bathed from head to toe in rubbing alchol. At that time the doctor did the only things he knew to do. The fever came down but my brothers normal temp of 98.6 was changed to 96.0. So a temp of 99.0 is not low grade fever anymore; at least not for him.  Are you under great amounts of stress? Stress can do wild things to your body. Under tremendos stress  the muscles literally separated from the bones in my chest area. Doctor's at first thought it was a heart attack but my pulse did not indicate such to be the case. I felt as if a huge weight had been droped on my chest, but it was stress. Vicatin would not even allow my body any relief, and the doctors had said if it didn't help that morphine was the next step.Fianlly, after several months of just letting nature run its course; I finally stopped hollering with every breath. I would shake like I was in a ice house on min. and feel normal the next; but my temp. was up and down like a yoyo. Do you have any other symptoms, coughing, sneezing,dizzy spells, black outs, nausea? Have you been to a doctor yet? If not; I strongly reccommend you go see one immediately. Keep in mind not all diseases or illness's cause the same reaction in a person. You can take 50 people with the flu. Some it turns into more upper respitory infections, and some of those can be fatal. Others just feel crappy and tired. While some can't see much difference in the flu and what most people would call a bad cold. My temp. runs 98.6; 99.0 is low grade, and any thing more than 102.6 I start calling the doctor. As I said I strongly reccomend you go straight to a doctor and have them check you out. I wish you well.
262698
Since polar bears live in cold climates, hence they have evolved mechanisms to conserve the heat loss from their body. For instance they have a thick fur to conserve heat loss through the body, for the same reason they have  smaller ears (notice sometimes how your ears turn red when you blush, or after a hot bath).\n\nMother's milk doesn't have anything special to keep them special. However polar animals have higher amounts on brown fat that keeps their body temperatures constant my uncoupling the reactions in the body that create ATP thereby releasing energy.
23160
yup- sure have and you can find mor info about it here\nhttp://www.niams.nih.gov/hi/topics/raynaud/ar125fs.htm
311540
Basically it works just the same as in other birds. It's a closed system, with a 4-chambered heart, and very efficient pulmonary circulation.\nIn addition, penguins have a special configuration of their blood vessels called _countercurrent_, in which the arteries (with oxygenated blood, extending toward the body surface) and the veins (with deoxygenated blood, going toward the body core) run close to each other, so that the heat from the body passes from the arteries to the veins before reaching the body surface. Thus, this heat is conserved instead of being lost at the body surface.\nThese structures are not found randomly throughout the penguin's body, but especially at their feet, where they represent adaptations for life upon frozen ground. \n\nEmperor penguins  in particular also have adaptations that allow them to dive to great depths. See more at this site:\nhttp://people.eku.edu/ritchisong/birdcirculatory.html
505310
It certainly can, but how is slightly unclear, exposure to cold causes your blood vessels and capillaries to constrict(shrink) to prevent heat loss which in turn increases the blood volume in rest of body and possibly making heart work harder and thereby triggering angina.
591431
Exercise involves lots of aerobic respiration, which is WORK, esp as all the muscles are contracting=WORKING.  98.6F is an approximate temp. we do NOT stay there all the time and our temp changes all day depending what we are doing.  In fact in females who are not on the pill or other hormones, the body temp fluctuates all during the month due to the different hormones in the blood (say 96 to 99 deg F) , but 98.6F is "normal" homeostasis body temp for the "sleeping-idle person...we are close to homeostasis at this temp, but during exercise, the body temp will naturally go up, but the body wants to cool you off so you don't FRY-COOK-DENATURE all your metabolic enzymes and go into HYPERTHERMIA.  If you are in good shape you may be able to cool off better than others!\n\nThis cell respiration process during exercise produces lots of ATP and body-muscle heat, which is lost as well. Body needs to cool off from doing all this WORK!  Skin can help us with thermo-regulation in several ways.  When we sweat, the moisure of sweat plus the heat helps reduce body temp by evaporative cooling.  Also,when we get red-overheated,the blood goes to perpheral circulation in skin to bring blood-heat to the surface to be lost by convection with the air currents.  Heat can also leave skin by radiation too.  You can feel heat coming off red sun burned or fevered people.
2532
There are many books on this topic. I usually refer people to check out books about the Inuits of Alaska. Your library can help you with this. Good luck