Note carefully the tissues which comprise both the tubules and the stroma.
- The cells lining the tubules are not very well preserved. But note that there are nuclei of various sizes.
- Also note that among the cells of the tubules are many, very tiny, very densely-basophilic specks. Correct recognition should include an easy explanation for these specks.
- The stroma includes numerous blood vessels, loose collagen fibers, and associated fibroblasts. But this stroma also contains scattered cells with conspicuous acidophilic cytoplasm.
No more hints.