Salivary gland

There are three salivary glands as follows

Then we have numerous buccal or lingual glands on the floor of the mouth. Saliva is secreted in the range of 800 to 1500 ml per day. It contains two types of protein.

  • Serous secretion which contains the enzyme ptyalin which is an α-amylase

  • Mucus secretion which contains mucin for lubricating food.

Parotid gland secretion is mainly serous while the remaining two salivary glands secrete a mixture of serous and mucous secretions, with the lingual glands being only mucus. Saliva has a pH of 6-7.

Secretion of saliva is via the parasympathetic vagus nerves with roots in the superior and inferior salivary nuclei of the brainstem. But sympathetic stimuli may also increase salivation in very small quantity. Increase in  blood supply to the salivary gland most especially activated by secretion of kallikrein with vasodilator effects can cause increase salivation. Kallikrein is converted to bradykinin which is a strong vasodilator.

 

Cross section through salivary gland x40  

 


Salivary gland explanatory video

 

 

 

 

 

 

 

 

 

 

 

 

Introduction

Cell biology

Embryology

Histology

Gross anatomy

Lymphatic drainage

Organ integration
Clinical anatomy

Quiz

Dissector

Physiology

Biochemistry

Pharmacology

Chemical Pathology

Anatomical Pathology

Imaging

Medicine

Surgery

Xerostomia
Salivation

Main Subject Course Links

eAnatomy eAnesthesia eBiochemistry eChemical pathology eCommunity Health
eDermatology eENT eGynecology eHematology eImaging
eMedicine eMedical microbiology eObstetrics eOphthalmology ePathology
ePediatrics ePharmacology ePhysiology ePsychiatry    eSurgery/eOrthopedics
eLab eOSCE eProcedures eInvestigations eSchool/Videopage
eOrgans eLocator Anatomy Museum eDissector eFractures/Dissect-it-yourself
All diseases eClerking eTreatment eDoctor ePatient

 


Electronic School of Medicine
Creator: Oluwole Ogunranti