As growth proceeds, the column of cells may divide or give off offshoots, in which case a compound gland is formed. In many glands, the number of branches is limited, in others (salivary, pancreas) a very large structure is finally formed by repeated growth and sub-division. As a rule, the branches do not unite with one another, but in one instance, the liver, this does occur when a reticulated compound gland is produced. In compound glands the more typical or secretory epithelium is found forming the terminal portion of each branch, and the uniting portions form ducts and are lined with a less modified type of epithelial cell. 
The adrenal glands don’t really get ‘tired’ in the way that you might expect. What happens is that, after a period of chronic stress, your body starts to run out of the hormone precursor material that it uses to make certain hormones. As this continues, it becomes more and more difficult for your body to produce the required levels of stress hormones, sex hormones, and other hormones and neurotransmitters. That’s when the ‘fatigue’ starts to kick in, and that’s when you need to offer your body some extra support.
Upon cell death, the proteolytic enzymes stored in pancreatic acinar cells immediately begin reacting with the cells themselves, destroying normal cell structure. (Ideally, histological specimens are fixed by perfusion of fixative through blood vessels, to preserve cells quickly and simultaneously throughout the specimen. This procedure is not available for post-mortem specimens, where the deceased may wait several hours before autopsy. Even specimens removed surgically are usually dropped as bulk samples into fixative, so preservation may vary between the center and the periphery of the specimen.