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Horses and humans are two of the few animals capable of sweating on most of their body, yet horses are larger and still have fully developed fur. In humans, the skin hairs lie flat in hot conditions, as the arrector pili muscles relax, preventing heat from being trapped by a layer of still air between the hairs, and increasing heat loss by ...
Some men are pregnant in body alone and, just like animals, enjoy the company of women with whom they can have children that will pass on their existence. Others are pregnant in both body and mind, and instead of children they carry wisdom, virtue, and above all, the art of civic order (209a).
Explicit legal prohibition of human sexual contact with animals is a legacy of the Abrahamic religions: [60] the Hebrew Bible imposes the death penalty on both the person and animal involved in an act of bestiality. [61] There are several examples known from medieval Europe of people and animals executed for committing bestiality.
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 early modern human vocal apparatus is generally thought to have been the same as that in present-day humans, as the present-day variation of the FOXP2 gene associated with the neurological prerequisites for speech and language ability seems to have evolved within the last 100,000 years, [124] and the modern human hyoid bone (which supports ...
Humans inhabit hot climates, both dry and humid, and have done so for millions of years. Selective use of clothing and technological inventions such as air conditioning allows humans to live in hot climates. One example is the Chaamba, who live in the Sahara Desert. They wear clothing that traps air in between skin and the clothes, preventing ...
The human pedigree recapitulating its phylogeny back to amoeba shown as a reinterpreted chain of being with living and fossil animals. From a critique of Ernst Haeckel 's theories, 1873. The set nature of species, and thus the absoluteness of creatures' places in the great chain, came into question during the 18th century.
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 ...