History of Animals

Author: Aristotle  | Date: 350 BC


Every animal is supplied with moisture, and, if the animal be deprived of the same by natural causes or artificial means, death ensues: further, every animal has another part in which the moisture is contained. These parts are blood and vein, and in other animals there is something to correspond; but in these latter the parts are imperfect, being merely fibre and serum or lymph.

Touch has its seat in a part uniform and homogeneous, as in the flesh or something of the kind, and generally, with animals supplied with blood, in the parts charged with blood. In other animals it has its seat in parts analogous to the parts charged with blood; but in all cases it is seated in parts that in their texture are homogeneous.

The active faculties, on the contrary, are seated in the parts that are heterogeneous: as, for instance, the business of preparing the food is seated in the mouth, and the office of locomotion in the feet, the wings, or in organs to correspond.

Again, some animals are supplied with blood, as man, the horse, and all such animals as are, when full-grown, either destitute of feet, or two-footed, or four-footed; other animals are bloodless, such as the bee and the wasp, and, of marine animals, the cuttle-fish, the crawfish, and all such animals as have more than four feet.


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Chicago: Aristotle, "4," History of Animals, trans. D’Arcy Wentworth Thompson Original Sources, accessed December 5, 2023, http://www.originalsources.com/Document.aspx?DocID=3USBRGB8IZAX9S9.

MLA: Aristotle. "4." History of Animals, translted by D’Arcy Wentworth Thompson, Original Sources. 5 Dec. 2023. http://www.originalsources.com/Document.aspx?DocID=3USBRGB8IZAX9S9.

Harvard: Aristotle, '4' in History of Animals, trans. . Original Sources, retrieved 5 December 2023, from http://www.originalsources.com/Document.aspx?DocID=3USBRGB8IZAX9S9.