has part has part has_part characteristic of has modifier abnormal muscle morphology muscular atrophy acquired diminution of muscle tissue associated with wasting as from death and reabsorption of cells, diminished cellular proliferation, decreased cellular volume, pressure, ischemia, malnutrition, reduced function or malfunction, or hormonal changes; occurs with age, immobilization, weightlessness, malnutrition or denervation muscle atrophy MPheno.ontology MP:0002269 abnormal atrophied muscle organ