① Serouscells:-structure:cellsareusuallypyramidal inshapenuclei:roundedbasally-located·cytoplasm:-apicalpart:acidophilio-basal part:basophilio--main function:tosecretesalivaryamylase11
11 Serous cells: -structure: cells are usually pyramidal in shape, nuclei: rounded basally-located cytoplasm: - apical part: acidophilic - basal part: basophilic -main function: to secrete salivary amylase
② Mucous cells:--structure:areusuallycuboidal&columnarcytoplasm:-pale-stained or foamy appearancenucleus:flattenedovalandpresseotowardthebasesofthecellsmucous cells are often organized astubules--main function:producemucous(viscous)secretioncontainingmoremucus12
12 Mucous cells: -structure: are usually cuboidal & columnar cytoplasm: -pale-stained or foamy appearance nucleus: flattened oval and pressed toward the bases of the cells mucous cells are often organized as tubules -main function: produce mucous (viscous) secretion containing more mucus
* Mixedacinus:seromucousacinus--structure:iscomposedofbothserousandmucouscellsthemucouscellsformtubules.buttheirendsarecapped by serous cells,which constitutetheserousdemilunes13
13 * Mixed acinus: seromucous acinus -structure: is composed of both serous and mucous cells the mucous cells form tubules, but their ends are capped by serous cells, which constitute the serous demilunes
* Myoepithelial cellsare found within the basal lamina of the secretoryendpiecesandintercalatedducts.surroundingthe secretoryportionare welldeveloped andbranchedFunction:--thecontractionofthesecellsacceleratesthesecretionof the saliva--bethepreventionofendpiecedistensionMyoepithelial cells
14 * Myoepithelial cells v are found within the basal lamina of the secretory endpieces and intercalated ducts. v surrounding the secretory portion are well developed and branched v Function: - the contraction of these cells accelerates the secretion of the saliva - be the prevention of endpiece distension Myoepithelial cells
2. ductsintercalatedducts:lined by simple low cuboidal epithelial cellsconnect withsecretory endpieceIntercalatedductstriatedducts
15 2. ducts intercalated ducts: l lined by simple low cuboidal epithelial cells l connect with secretory endpiece Intercalated duct striated ducts