Defecation Process

Defecation

Below is the process of defecation which is i included the detail information about it. Have you wonder how does the procedure is ?

Well, this is the answer to all of your mystery !

Fecal continence is maintained by two sphincters that surround the anal canal. The internal anal sphincter is an extension of the muscularis externa, and thus is smooth muscle innervated by enteric neurons found in the myenteric plexus. 

The external anal sphincter is skeletal musclethat can be consciously controlled, and is innervated by somatic efferent neurons. The figure is a schematic sagittal view of the lower rectum and anus showing the anal sphincters.

Another skeletal muscle that contributes to the maintenance of fecal continence is the puborectalismuscle. This muscle loops around the rectum like a sling, pulling it forward to create a more acute angle between the rectum and the anal canal (the anorectal angle). 

During defecation, there is conscious relaxation of the puborectalis muscle, which creates a more open anorectal angle and allows for a straigther passage through the anal canal. Look at Figure 1 in this paper for an illustration of the role of the puborectalis muscle.

This is our face when we are doing defecation process