Figure 6-46.
Sagittal cryosections of a 3-month-old medaka thymus, stained with hematoxylin and eosin. The thymus is located dorsoposterior to the gill chamber. The area inside the red rectangle in A is enlarged in B. (Iwanami N. and Takahama Y. Cell Technology (2004) 23, 45–48 in Japanese.)