The body structure that does not seem to move is vestigials.
Zayden is most likely abusing Depressants
Liver are failing is because of depressants. When taking depressants and overdosing like cough syrup can cause the organs go into a state of depressant. Which causes the organs to have problems and can kill him.
Every organism (well, animal) only has one binomial name
A gradual and progressive decline in the abilities of multiple cognitive domains.
The hypotheses is stated that smoking cigarettes depending on the average rate you smoke is an increase for lung cancer or breast cancer