In the image below, also of a rabbit adrenal, the reticularis occupies roughly 2/3rds of the center, with a bit of fasiculata on the left and the medulla on the right (H&E). Cells within this zone are arranged in cords that project in many different directions and anastomose with one another. The innermost zone of the cortex is the zona reticularis. Notice the shape and foamy appearance of the cells in this micrograph. The image below is of the fasiculata in a rabbit adrenal (H&E stain).Īs seen the next image, cortical capillaries are usually prominent within the fasiculata. They also are arranged in distinctively straight cords that radiate toward the medulla.
Cells in the fasiculata are polyhedral and usually have a foamy appearance due to abundant lipid droplets. The zona fasiculata is the middle and largest of the three zones in the cortex. In the image below, the zona glomerulosa from the adrenal of a cat and rabbit is shown (H&E stain). In some species, cells adjacent to the capsule are are arranged in quite regular "arcades". Cells within this zone tend to be columnar in shape and are arranged in irregular cords. The outermost zone is the zona glomerulosa. However, the boundaries between zones are indistinct. At both low and high magnification, one can readily differentiate these zones based on the pattern produced by cords of cells. However, only two of these layers are of homeostatic significance.
Endocrine System > Adrenal Glands Histology of the Adrenal CortexĬells in the adrenal cortex are arranged into three concentric zones. Cortex of suprarenal gland Essentially the gland is divided into three layers.
0 kommentar(er)
