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. 2021 Aug 2;10(8):1964. doi: 10.3390/cells10081964

Figure 9.

Figure 9

The granulation tissue at the ulcer base is the connective tissue component. This structure consists of fibroblasts, myofibroblasts (arrows), macrophages, and proliferating endothelial cells, forming blood vessels and microvessels (*) filled with erythrocytes (RBCs; arrowheads).