has part has part has_part characteristic of has modifier cell of skeletal muscle decreased skeletal muscle fiber size skeletal muscle fiber atrophy acquired diminution of the size of skeletal muscle fibers 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:0009413 MPheno.ontology skeletal muscle atrophy abnormal atrophied