What is Gallbladder? And 5 Important Functions of Gallbladder You Know
What is Gallbladder – Bile secreted from liver is stored in it. The capacity of it is approximately 50 mL. It is not essential for life and it is removed (cholecystectomy) in patients suffering from gallbladder dysfunction. After cholecystectomy, patients do not suffer from any major disadvantage. In some species, it is absent.
Functions Of Gallbladder:
There are many functions of gallbladder but major functions are the storage and concentration of bile. These are:
1- Storage of Bile:
Bile is continuously secreted from liver. But it is released into intestine only intermittently and most of the bile is stored in gallbladder till it is required.
2- Concentration of Bile:
Bile is concentrated while it is stored in it. The mucosa of it rapidly reabsorbs water and electrolytes, except calcium and potassium. But the bile salts, bile pigments, cholesterol and lecithin are not reabsorbed. So, the concentration of these substances in bile increases 5 to 10 times.
3- Alteration of pH of Bile:
The pH of bile decreases from 8 — 8.6 to. 7—7.6 and it becomes less alkaline when it is stored in it.
4- Secretion of Mucin:
It secretes mucin and adds it to bile. When bile is released into the intestine, mucin acts as a lubricant for movement of chyme in the intestine.
5- Maintenance of Pressure in Biliary System:
Due to the concentrating capacity, it maintains a pressure of about 7 cm H20 in biliary system. This pressure in the biliary system is essential for the release of bile into the intestine.