can you name some of them?
Herophilos of Alexandria, Imperial Japanese Army, Josef Mengele
Vivisection
Celsus in "De Medicina" and the early-Christian writer Tertullian state that Herophilos of Alexandria vivisected at least 600 live prisoners.

Unit 731, a biological and chemical warfare research and development unit of the Imperial Japanese Army, undertook lethal human experimentation during the period that comprised both the Second Sino-Japanese War, and the Second World War (1937–1945). In Mindanao, Moro Muslim prisoners of war were subjected to various forms of vivisection by the Japanese, in many cases without anesthesia.

Nazi human experimentation involved many medical experiments on live subjects, such as vivisections by Josef Mengele, usually without anesthesia.
where does the name guinea pig come from From Latin for "little pig"; derived from "cabiai", the animal's name in the language of the Galibi tribes once native to French Guiana what is their role in research and science? Italian biologists Marcello Malpighi and Carlo Fracassati conducted vivisections of this animal in their examinations of anatomic structures. have these animals been domesticated? Yes, domesticated animals generally live in cages, although some owners of large numbers of guinea pigs dedicate entire rooms to their pets. when were they domesticated for the first time? 5000 BC by whom? Tribes in the Andean region of South America can you explain the scientific procedure you mentioned above, in brief? Also known as a V-section - surgery conducted for experimental purposes on a living organism, typically animals with a central nervous system, to view living internal structure. is this considered to be cruel to animals? Yes, the Cruelty to Animals Act, 1876 in Britain determined that one could only conduct vivisection on animals with the appropriate license from the state, and that the work the physiologist was doing had to be original and absolutely necessary. is this procedure performed on humans as well? Yes, it was practiced by some Greek anatomists in Alexandria in the 3rd century BC.
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Vivisection [SEP] Human vivisection
It is possible that human vivisection was practiced by some Greek anatomists in Alexandria in the 3rd century BC. Celsus in "De Medicina" and the early-Christian writer Tertullian state that Herophilos of Alexandria vivisected at least 600 live prisoners. Unit 731, a biological and chemical warfare research and development unit of the Imperial Japanese Army, undertook lethal human experimentation during the period that comprised both the Second Sino-Japanese War, and the Second World War (1937–1945). In Mindanao, Moro Muslim prisoners of war were subjected to various forms of vivisection by the Japanese, in many cases without anesthesia. Nazi human experimentation involved many medical experiments on live subjects, such as vivisections by Josef Mengele, usually without anesthesia.