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its like a valve that opens when the when ur ready 2 excrete

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How does the muscle of the internal anal sphincter differ from that of the external anal sphincter?

The internal urethral sphincter an involuntary sphincter that keeps the urethra closed when urine is not being used. The external urethral sphincter is fashioned by skeletal muscles as the urethra passes thorugh the pelvic floor.This sphincter is voluntary controlled.


Is the Sphincter a voluntary muscle?

The anal sphincter and the bladder sphincter in potty trained children and in most other people whose spinal cords are intact or are not suffering from some diseases.


What is the second type of sphincter?

The second type of sphincter is the internal anal sphincter, which is made up of smooth muscle and is not under voluntary control. It helps control the release of feces from the rectum into the anal canal.


What disease can the anus get?

The anus can be affected by the internal and external sphincters, which are muscles that use tonic contracture to keep certain parts of the gastrointestinal tract closed, until it is time for something to pass. The internal sphincter is involuntary and what gives you the urge to defecate (have a bowel movement). The external sphincter is voluntary. This is what allows you to hold your feces - which was learned during potty training - until it is convenient to have a bowel movement. If the external sphincter continues to suppress the internal sphincter, it is possible that this could contribute to constipation.


What parts make up the anus?

The anus is made up of two sphincter muscles: the internal anal sphincter, which is involuntary, and the external anal sphincter, which is under voluntary control. The anus also contains sensitive nerve endings that detect the passage of stool.

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How does the muscle of the internal anal sphincter differ from that of the external anal sphincter?

The internal urethral sphincter an involuntary sphincter that keeps the urethra closed when urine is not being used. The external urethral sphincter is fashioned by skeletal muscles as the urethra passes thorugh the pelvic floor.This sphincter is voluntary controlled.


What keeps the urethra closed when urine is not being passed?

internal urethral sphincter


The internal urethral sphincter is composed of skeletal muscle whereas the external urethral sphincter the lower sphincter is composed of smooth muscle and thus is under involuntary control?

it is the opposite. The internal sphincter is composed of smooth muscles while the external one is composed of skeletal muscles


Where is the internal urethral spinchter located?

The internal urethral sphincter is a smooth muscle located at the neck of the urinary bladder and surrounds the opening of the urethra. It helps in controlling the flow of urine from the bladder to the urethra.


A urinary sphincter to control the flow of urine is located at each end of the urethra?

True. There is a external and internal sphincter


Are there 2 anal sphincter muscles?

Yes, there are two anal sphincter muscles: the internal anal sphincter, which is made of smooth muscle and is under involuntary control, and the external anal sphincter, which is made of skeletal muscle and is under voluntary control.


What kind of muscle is the orbicularis oculi and orbicularis oris in terms of function?

Sphincter Muscle


Why do you urinate when you defecate?

The primary muscles that function to hold in stool are the internal and external anal sphincters. The internal sphincter is a completely involuntary organ, and as stool passes through this sphincter, the muscle slowly relaxes. The stool then contacts the external sphincter, which is a completely voluntary organ. At this point, we sense that there is an increased pressure in our rectum, and we likely feel the need to defecate. If a toilet or other commode is close by, we sit down and voluntarily relax our external anal sphincter, and the stool passes through. If, however, we would rather not have a bowel movement at that moment, we voluntarily tighten our external anal sphincter, and the stool is retained in the rectum.


Is the Sphincter a voluntary muscle?

The anal sphincter and the bladder sphincter in potty trained children and in most other people whose spinal cords are intact or are not suffering from some diseases.


What is the second type of sphincter?

The second type of sphincter is the internal anal sphincter, which is made up of smooth muscle and is not under voluntary control. It helps control the release of feces from the rectum into the anal canal.


Which sphincter allows for defecation and is under voluntary control?

The external anal sphincter is under voluntary control. You have the urge to defecate because your internal anal sphincter involuntarily opens, but you can keep yourself from going to the bathroom because your external anal sphincter is voluntarily closed. Hope that helps!