Salivary gland  is an exocrine gland, there are three types of salivary gland which is located in and around the mouth and throat, it is divided into major and minor salivary glands which produces mucous, serous and mixture of mucous and serous salivary secretions. Histologically salivary gland consist of mucous acini, serous acini, myoepithelial cells and ducts. parotid gland is an ectodermal origin, whereas sublingual and submandibular is endodermal in origin.there are many clinical considerations of the salivary gland which include mumps, Frey’s syndrome,etc.