Fig. 4. Representative hematoxylin and eosin staining of lamprey and bovine
cartilages. (A) Lamprey pericardial cartilage. (B) Lamprey annular cartilage.
(C) Bovine auricular cartilage. Outer perichondrium (op), perichondrium (p),
inner perichondrium (ip), blood vessels (b), adipose cells (a), elastic fibers
(e). Scale bars, 100 µm.