 Hello everyone, welcome back to another session in dentistry and more Today we have salivary glands. So this topic will be dealt in few sessions So this session is about basic terminologies and classification Salivary glands All of us know it secretes saliva and which keeps oral cavity moist And it has got many functions ranging from lubrication and also antibacterial Properties, so all will be dealt in later sessions. So we'll start with few terminologies or its classification that is Basically this glands so any glands are divided into endocrine or exocrine glands So endocrine glands they are glands That secretes their products through the basal lamina. It means it is not having a deck system That is a decked less glands. It doesn't have a deck to secrete its secretions Whereas exocrine glands secrete their products through a decked the glands and this group can be further divided into Mirocrane, apocrine and holocrane. Okay, so that is the basic difference between Endocrine which doesn't have any Decked this is the decked Glands, they are further classified Mirocrane apocrine and holocrane So the first one Mirocrane glands, they are also known as ectrine glands They secrete or their cells secrete the substance by exocytosis Okay, exocytosis a process known as exocytosis Exocytosis is a process by which the contents of a cell vacuole are released to the exterior through Fusion of the vacuole membrane with the cell membrane. So that is how this process is happening exocytosis So Mirocrane glands are our salivary glands that is cirrus and mucus salivary glands salivary glands, okay The examples are salivary glands Whereas apocrine glands a portion of the secreting cells body is lost during secretion Just a portion of the secreting cell body Example is mammary glands and the holocrane glands the entire cell disintegrates to secrete its substance Example is sebaceous glands They are classification of exocrine glands because it has dex. This is the process how they secrete the content Okay, by exocytosis a portion of the cell Lost or the entire cell disintegrates. So that is how it differs Mirocrane, apocrine and holocrane This is salivary glands, mammary glands and sebaceous glands And Basically the salivary glands are compound, tubulo, asinor, Mirocrane or exocrine glands Where the dex open into oral cavity and the oral cavity is kept moist by a filimofluid which is known as saliva which teeth which cause basically the teeth and mucosa and Saliva is a very complex fluid produced by the salivary glands Now we have the classification of salivary glands now the Introduction part is over now. We are moving to the salivary glands classification The main the basic classification that is a major and minor which is based on the size and location Okay, so the major salivary glands we have three pairs three pairs that is on the right and left side So the parotid glands, subventibular gland and sublingual gland so These glands are pairs You can see on the right and left side and which is present on the outside the oral cavity and It has a dex which secretes their products into the oral cavity of the mouth Whereas the minor salivary glands, they are not bigger in size. They are smaller We have labial Minus salivary glands lingual, palatal, buccal, glosopalatine and Retromolar they are present in the submucosal layer and These glands opens onto the mucosal surface by short dectal openings That is a one classification and Another classification is based on the type of secretion that is serosecretion mucous or mixed That is a combined serous and mucous So serosecretion glands are parotid bone ebner's gland bone ebner's gland whereas the mucous secretion glands are glosopalatine glosopalatine and Glans of Blandinan none whereas the mixed glands they are subventibular and sublingual subventibular and Sublingual glands So that is based on the secretion. Okay type of secretion So we learned about what is the classification in general endocrine and exocrine glands? Endocrine are dexless. They are with dex and we have the basic classification major parotid Subventibular sublingual and minor classification then based on the type of secretion serous mucous and mixed and also exocrine gland classified as merocrine apocrine and holocrine and liver and pancreas they are Considered as both exocrine and endocrine They are exocrine glands because they secrete products that is bile and pancreatic juice, okay liver secret bile and pancreas secret pancreatic juice, okay Into the gastrointestinal tract through a series of dex So it is a exocrine gland and they are endocrine glands because they secrete other substance directly into Bloodstream without any dex. So liver and pancreas considered as exocrine and endocrine gland