PHOTO 24 - Rat kidney
Rat kidney.
Histological section through the mid IS (top) showing the heterogeneity of the IS where vascular bundles (light) alternate with interbundle regions.
In these interbundle regions, the tubules with thick dark wall are the mitochodria-rich thick ascending limbs (TAL). The light structures between the TAls comprise the collecting ducts, the thin limbs, and the capillaries of the interbundle plexuses.
Brigitte Kaissling and Wilhelm Kriz,
Anatomisches Institut, Heidelberg, RFA