Figure 2.

Photomicrographs of histological cross sections of Pectoralis major muscle from broilers affected by wooden breast (n = 20, for each group). (A) Normal. Muscle fiber (white arrow); perimysium (*); extracellular matrix (arrowhead); fibroblasts (black arrow). (B) Moderate aspect of the wooden breast. Muscle fiber (white arrow); perimysium (*); degenerated muscle fiber infiltrated by inflammatory cells (green arrow); adipocytes (yellow arrow). (C) Severe aspect of wooden breast. Muscle fiber (white arrow), perimysium (*), adipocytes (yellow arrows). HE, 200×.