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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.
Persistence hunting, also known as endurance hunting or long-distance hunting, is a variant of pursuit predation in which a predator will bring down a prey item via indirect means, such as exhaustion, heat illness or injury. [1] [2] Hunters of this type will typically display adaptions for distance running, such as longer legs, [3] temperature ...
Humans, unlike most other species, have concealed ovulation, a lack of obvious external signs to signal estral receptivity at ovulation (i.e., the ability to become pregnant). Some species of animals with estrous cycles have unmistakable outward displays of receptivity, ranging from engorged and colorful genitals to behavioral changes like ...
Extreme heat is both one of Death Valley's greatest intrigues and its most serious safety concern. It's not uncommon for a few people to die in the park from heatstroke in any given summer.
As the temperature climbed to a record 128 degrees in Death Valley National Park, a group of motorcyclists was sickened by the heat, and one died.
Robino’s vehicle below Natural Bridge parking lot. (NPS) A second person has died in Death Valley National Park due to heat. A Los Angeles County man visiting the park died of heat exposure on ...
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]
Climate change increases the frequency and severity of heatwaves and thus heat stress for people. Human responses to heat stress can include heat stroke and overheating (hyperthermia). Extreme heat is also linked to acute kidney injury, low quality sleep, [21] [22] and complications with pregnancy.