has part has part has_part characteristic of has modifier muscular atrophy skeletal muscle atrophy acquired diminution of the size of skeletal 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 MP:0009417 MPheno.ontology decreased skeletal muscle size abnormal atrophied skeletal muscle tissue