English Pain in invertebrates Cited by user Rjwilmsi on 17 Feb 2018 Pain in invertebrates is a contentious issue. Although there are numerous definitions of pain, almost all involve two key components.
English Pain in animals Cited by user Rjwilmsi on 01 Oct 2014 Pain in animals is a contentious issue. The standard measure of pain in humans is how a person reports that pain, (for example, on a pain scale).