figure 4 - uploaded by Ahmed Abdulla Hussein
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... The parotid gland was triangular and situated caudal to the masseter muscle that resembles in crab-eating-fox (Pereira and Faria Júnior, 2018), while Matosz et al. (2018) believed that the parotid gland elongated as it reached the mandibular angle in rabbit. Likewise, Hussein (2016), in rabbit, also confirmed that it placed on either side of trachea underneath the larynx, although in camel, it was reported that it was rectangular in its outline (Rezk and Shaker, 2017). Our findings showed the purely serous secretory cells in the parotid gland and the mixed nature in the other four glands which are nearly similar to the results of Khosravani et al. (2007) in ferrets. ...
... However, Dyce et al. (2010) and Kneissl et al. (2011) added that it opens in dogs against the third or the fourth premolar upper tooth. In rabbits, it perforated at the last superior molar (Hussein, 2016;Matosz et al., 2018), while it opened at the level of the 4 th molar tooth superiorly in camel (Rezk and Shaker, 2017). The parotid papilla was located dorsally in the upper buccal mucosa with a curved bent that prevents its occlusion with food particles, so sialocoeles were rare in it. ...
The normal descriptive anatomical and histological studies on feline major salivary glands were estimated. We were focusing on clinically valuable glands; parotid, mandibular and sublingual salivary glands, and their ductal pathways by making sialography and papillary cannulation, that can help surgeons in their surgical approach. The work was carried out on seven cadaver domestic cats of both sexes. Anatomical dissection was performed to separate each gland and its duct. A novel papillary cannulation technique was achieved along with the radiographical study which occurred by injecting the ductal papillae with lead oxide dissolved in turpentine oil. Our findings asserted that the parotid gland was caudal to the mandible with a serous secretory unit. Its papilla was located dorsally in the upper buccal mucosa with a curved bent to prevent its occlusion with food particles. Thus, sialocoele was rarely seen in the parotid gland. The mandibular and sublingual salivary glands were closely connected in one compact membrane that has both serous and mucous endpieces. Their ducts passed together in the intermandibular space till they opened in the sublingual caruncles that are easily obstructed by food remnants. Therefore, they are more susceptible to sialocoele. The zygomatic gland was the deepest, while the molar gland appeared at the mandibular lip, which is composed mainly of mucous adenomeres. Eventually, we could provide in the current study a complete descriptive atlas of the major salivary glands of domestic cats, and we explained why sialocoele occurs more frequently in mandibulo-sublingual glands than in parotid glands.
... .81,82) illustrate the inter-lober duct and mean excretory duct histological sections of the sublingual gland, observed natively stained but contain light blue in the cells may be found hyaluronic acid in their cytoplasm. ...
... .81) Showing histological sections of the sublingual gland. A) The intralobular ducts were negatively stained with alcian blue (pH 2.5) stain (red arrow head) (4.82) Showing histological sections of the sublingual gland. ...
... .81,82) illustrate the inter-lober duct and mean excretory duct histological sections of the sublingual gland, observed natively stained but contain light blue in the cells may be found hyaluronic acid in their cytoplasm. ...
... .81) Showing histological sections of the sublingual gland. A) The intralobular ducts were negatively stained with alcian blue (pH 2.5) stain (red arrow head) (4.82) Showing histological sections of the sublingual gland. ...
The myoepithelial cells (MECs) are the first classified according to peikaryon diameter and the numbers of primary cytoplasmic processes. MECs perikaryons diameter of smallest MECs have three primary cytoplasmic processes , but the largest MECs have six primary cytoplasmic processes and the diameter of MECs which have four and five primary cytoplasmic processes ranged between that minted before respectively. In parotid gland, MECs arcs on the serous acini and intercalated ducts they have three to five primary cytoplasmic processes. In the submandibular gland MEC have four to six primary cytoplasmic processes around the mucous acini. Recorded from current study, high number of MECs that have five primary cytoplasmic processes. While MECs that were detected around serous tubules and the intercalated ducts have three to five primary cytoplasmic processes. In the serous tubules the number of MECs showing significant deference (P≤ 0.05) whereas have four primary cytoplasmic processes and show significant deference at (P≤ 0.05) in number of MECs that have three primary cytoplasmic processes around intercalated ducts. In the sublingual gland MECs surround the mucous acini and intercalated ducts which have four to six primary cytoplasmic processes. MECs around the serous demilune have three to five primary cytoplasmic processes, and show that MECs have four primary cytoplasmic processes significant deference at (P≤0.05) in number comparative with other MECs. The submandibular gland are production of the epidermal growth factor which indected by the use of immunocytochemistry technech, however the sublingual gland partially produced it. But neverless its produced by parotid gland.
The results expound that the mucous acini in submandibular gland and sublingual gland are acidic mucin where stained positively by alcian blue (pH 2.5) stain, but the parotid gland are non-acidic Mucin. In this result expounds the intercalated duct and the striated ducts were negatively stained with Alcian blue (pH 2.5) stain. The parotid, submandibular and sublingual gland were positively stained with periodic acid Schiff (PAS) regent, which indicated the neutral mucin.
... The parotid gland are thickest inter-lobar connective tissue then the sublingual gland finally the submandibular are thinnest inter-lobar connective tissue. The other study that similar these results when study on human salivary gland (Hussein, 2016). ...
The investigations on saliva and salivary glands have become focal point of a high number of studies, which came about in an impressive advancement in the knowledge about the salivary gland. There are just a few studies that designate the comparative histological investigation of the major salivary glands in domestic rabbit. The first study that estimation the mucous acini between submandibular and sublingual gland. Thirty domestic rabbits were used for this study. Paraffin sections from the three major salivary glands were stained with H & E, Masson trichrome and EGF stain. Significantly difference (P≤ ≤ ≤ ≤ ≤ 0.05) in the size and weight of the glands were observed. The length of the mean execratory duct was significantly different between the glands (P≤ ≤ ≤ ≤ ≤ 0.05). The parotid gland were the longest. The histological results showed significant changes among the studied gland at (P ≥ ≥ ≥ ≥ ≥ 0.05) in thickness of inter-lobar connective tissue. The parotid gland possesses widest inter-lobar connective tissue followed by the sublingual gland then the submandibular gland. Moreover, significantly difference (P≤ ≤ ≤ ≤ ≤ 0.05) in the number of the intercalated ducts was found in the lobules of the submandibular gland followed by sublingual gland then the parotid gland with less number. In addition to that there was Significant difference (P≤ ≤ ≤ ≤ ≤ 0.05) in the number of the striated ducts, with the high number found in the submandibular gland followed by sublingual gland and the parotid gland with fewest number. Significantly different (P≤ ≤ ≤ ≤ ≤ 0.05) the number of the serous acini the high number that found in the parotid gland next the serous tubules in submandibular gland finally the serous Demilunein the sublingual gland. Significantly different (P≤ ≤ ≤ ≤ ≤ 0.05) the number of the mucous acini in submandibular gland higher than sublingual gland. The serous acini in parotid gland are not production of the EGF because are weakly staining by epidermal growth factor stain also ductal system. The mucous acini in submandibular gland are production of the EGF yet, strongly positive with epidermal growth factor stain that indicated to screted EGF. While the serous tubules, intercalated and sitrated duct are not secreted EGF. The mucous acini in sublingual gland are positive staining by epidermal growth factor stain indicated partialy secretion of EGF. The submandibular gland are production of the epidermal growth factor, which indected by use immunocytochemistry technetion, however, the sublingual gland partially produced its, but neverless produced by parotid gland. The comparative in numder and diamstter of ducts and thickest of connective tissue as well as number of acini and estimation of EGF in each three major salivary gland.
