Freeze fracture replicas of zonula occludens junctions from the large intestine of a tadpole (upper) and intestine of a post-metamorphic toad (lower). The occluding junction appears as a meshwork of...

Scanning electron micrograph of the lumenal surface of the toad bladder shows the boundaries of four polygonal squamous epithelial cells surrounding a mitochondrial-rich cell bearing short globular mi...

Figure 421 from Chapter 16 (Cytoplasmic matrix and cytoskeleton) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Horizontal section through the apical cytoplasm of a Sertoli cell in the testis of the t...

Transmission electron micrograph of two frog epithelial cell cells showing the tight junction complex running horizontally in this image. Additional reference: Farquhar, M.G. and G.E. Palade. 1965. ...