In this article we will discuss about the functions and factors controlling movement of gall bladder. Functions of Gall-Bladder: Functions of gall-bladder can be summarised as follows: i. It is an efficient storehouse of bile. ii. It absorbs water and concentrates bile about 10 times. iii. It absorbs inorganic salts from bile to some extent and reduces the alkalinity of [...]
The presence of muscular tissue in the alimentary canal indicates that some sort of movements must be present in the gastro-intestinal tract. As a matter of fact, the alimentary canal does move, its different parts showing different kinds of movements. Reason for Movement: If one recollects the chief functions of the digestive tract, such as digestion, secretion, absorption, defecation etc., [...]
Deglutition or swallowing is probably a reflex phenomenon. Higher centres facilitate this reflex. Once aroused, the swallowing centre in the medulla evokes the complete act of swallowing by discharge through six nuclei and the motor neurones. This reflex act occurs in three stages: (1) First or oral, (2) Second or pharyngeal, and (3) Third or oesophageal (Fig. 9.46). (1) First [...]