1065
( B ) Loss of parkin function as a result of familial mutations ( in the case of AR - PD ) or aging , environmental or cellular stress ( in the case of sporadic PD ) leads to the accumulation of abnormal mitochondria , owing to faulty mitophagy .
 cellular, mitochondria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 cellular, mitochondria