|Description:||This is from the trachea of a cat at medium power. The globules of
mucus in the goblet cells stain light blue. You can barely make out the
thin blue line at the apical surface of the ciliated cells. This line
represent the basal bodies of the cilia. Note the "staggered"
arrangement of the nuclei in this pseudostratified epithelium. In the
trachea and the primary bronchus, you will not find a well-developed
band of muscularis mucosae made up of smooth muscles. Thus the lamina
propria and the submucosa blend together. The cells of the submucosal
glands contain purplish serous granules and bluish globules of mucus in
the cytoplasm. There is a separation artifact between the connective
tissue in the propria-submucosa and the hyaline cartilage. In this
section the red blood cells stain yellow (as seen in the small vein).
PK1598. K2c. Original mag. 100x. AB-PAS-FeH-PA. Trachea. Respiratory