KROK 1 2019 – Question 168 · KROK (Medicine) · Histology, Cytology, and Embryology
A 24-year-old man undergoes surgery and during the operation, an organ is excised and sent for histological evaluation. A light microscopic examination reveals the organ encased by thin connective tissue capsule that enters the substance of the lobes to further subdivide the organ into irregular lobular units. Each lobule contains a cluster of follicles filled with colloid. Follicular epithelium consists of low columnar, cuboidal or squamous cells depending on the level of activity of the follicle. Which of the following organs does this tissue most likely belong to?
- A. Pancreas
- B. Parotid gland
- C. Thymus
- D. Parathyroid gland
- E. Thyroid gland
Hint
Consider how this organ stores its secretory product outside the cells and what the varying height of the lining cells tells you about its functional state.
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