Figure 4-5a. Monocytic series:
b. Stem (Ferrata Cell)
Size. Twelve to 20 microns in diameter.
(2) Nucleus. The nucleus is oval or indented and light purple. The nuclear
chromatin is fine and spongy. One to five nucleoli may represent. The nucleus-
cytoplasm ratio is 5:1.
(3) Cytoplasm. The cytoplasm is gray-blue with fine dust like azurophilic
Figure 4-5b. Monocytic series: Promonocyte.
Size. Fourteen to 20 microns in diameter.
(2) Nucleus. The nucleus is round or kidney-shaped, but can be deeply
indented or have two or more lobes. One of the most distinctive features of the
monocyte is the presence of superimposed lobes, giving the nucleus the appearance of
brain-like convolutions. Heavy lines marking the edges of the folds and grooves are