Figure 3: Electron micrograph of Cowpe's gland during prebreeding period showing acinar cell containing large basal nucleus (N). Golgi apparatus (G) is well developed. Coated vesicles are also seen in the Golgi zone. Mitochondria (M) with lamellar cristae are seen near the Golgi. Apical cytoplasm is filled with moderately electron-dense and highly electron-dense secretory granules (Sg) in the supranuclear cytoplasm. Rough endoplasmic reticulum (RER) in the form of short tubular and lamellar cisternae dotted with ribosomes is observed near the perinuclear part of the cytoplasm. 15,000× magnification.