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(a and e) NF 41 and 43 frontal, resin-embedded, H&E stained sections. (b-d) NF 41+ transverse, resin-embedded, H&E stained sections. (f-h) NF 44 frontal sections with BrdU label, hematoxylin counterstain. (i-k) NF 44 frontal sections stained with alcian blue for cartilage and direct red for various collagens; IH, infrahyoideus muscle; OH, orbitohyoideus muscle; scale bar is 0.2 mm.
