by sex
The capillaries keep blood from leaking. They clot together quickly and keep as much blood inside the body as possible.
# I think that is an 'urban legend'. In a study from 1959, 'Effect of prolonged cold exposure on the gross blood composition of the rat' no change in hematoocrit levels were seen.
Vasoconstriction, the tightening/narrowing of blood vessel diameter, is the "how" blood flow is limited when it's cold. The "why" deals mainly with your body attempting to keep its core warm. So anything around your heart mainly. Therefore, all extremities get less blood.
They Keep out cold and keep in hot or keep in cold and keep out hot it depends on the weather
Cotton is always a good fiber to have in cold weather. Cotton is warm, and having it in your socks in cold weather will be sure to keep your feet warm.
it could be because its soo cold that it freezes
trying to keep warm
In cold weather, people have made different kinds of boots. They have the warm boots to keep you warm so I suggest you where some warm boots
The best material to make socks out of to keep feet warm in cold weather is wool. Wool is very thick and that makes it possible for it to hold in the body heat and keep the cold out.
Windy, damp.
Put them in a greenhouse and zip it up but keep on watering and checking on them.
It means it is very hard to start and keep running in cold weather.