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Some species, such as cats, cows and domestic pigs, are polyestrous, meaning that they can go into heat several times per year. Seasonally polyestrous animals or seasonal breeders have more than one estrous cycle during a specific time of the year and can be divided into short-day and long-day breeders:
Humans adapted to heat early on. In Africa, the climate selected for traits that helped them stay cool. Also, humans had physiological mechanisms that reduced the rate of metabolism and that modified the sensitivity of sweat glands to provide an adequate amount for cooldown without the individual becoming dehydrated. [17] [20]
As in other mammals, human thermoregulation is an important aspect of homeostasis. In thermoregulation, body heat is generated mostly in the deep organs, especially the liver, brain, and heart, and in contraction of skeletal muscles. [1] Humans have been able to adapt to a great diversity of climates, including hot humid and hot arid.
The relentless search for racism in the past has reached the point of diminishing returns.
Skin changes can occur after prolonged exposure to any heat source, Camp noted, including laptops, heated car seats, hot water bottles, electric blankets, space heaters and heating pads used to ...
Sperm cells were believed to contain complete preformed individuals called "animalcules". Development was therefore a matter of enlarging this into a fully formed being. The term homunculus was later used in the discussion of conception and birth. Nicolas Hartsoeker postulated the existence of animalcules in the semen of humans and other ...
September felt more like an abnormally hot July with an average global air temperature of 16.38 degrees Celsius (61.45 Fahrenheit), making the month 0.93 degrees Celsius hotter than the 1991 to ...
When one has ants in one's pants, the mites go up and the tights come down. [8]: 66 (In a strict scientific sense, a mite is not an ant, although "mite" in common speech can refer to any small creature.) Stalactites hang tight, hang down like tights on a line; stalagmites might bite (if you sit on them), might reach the roof. [8]: 66