Serous Cells And The Ductal System Of Salivary Glands

Serous Cells And The Ductal System Of Salivary Glands

Question 1. Ductal system of major salivary glands.
Answer:

• The ductal system of salivary glands. consist of hollow tubes.
• Three classes of ducts are preset.
• Intercalated duct cells
• Striated duct cell

Question 2. Serous cell.
Answer:

Serous cell Structure:

• Typically spherical
• Consists of 812 cells surrounding a central lumen.
• Lumen has a finger-like extension located between adjacent cells called intercellular canaliculi.
• The nucleus is spherical and placed basally.
• The apical cytoplasm shows the accumulation of secretory granules.
• The basal cytoplasm contains numerous cisternae of rough endoplasmic reticulum, a large Golgi complex.
• The cell contains all typical cell organelles
• The secretory granules are 1 mm in diameter.
• The granules are zymogen granules and are formed by glycosylated proteins.
• Cell shows enzymatic activity.
• The mature granule stored at the apex of the cell is emptied into the lumen by exocytosis.
• The Golgi apparatus consists of 4 6 smooth surface saccules located apically and laterally to the cell nucleus.
• Cells also contain a good number of mitochondria, a powerhouse of the cells.
• Lysosomes are seen with hydrolytic enzymes, which help to destroy foreign material and warn out cell organelles.
• Bundles of tonofilaments, associated with desmosomes and microfilaments, may be seen in the cytoplasm.

Serous cell Functions:

• They are specialized for the synthesis, storage, and secretion of proteins. They secrete glycoproteins.
• Rought endoplasmic reticulum synthesizing protein, 2Golgi complex transfer protein to transfats,
• Immature granules,
• Mature granules with concentrated protein,
• Exocytosis