The exit of waste materials from the human alimentary canal is regulated by:a)Large intestineb)Mouthc)Anal sphinctersd)UrethraCorrect answer is 'C'. Can you explain this answer?

Question

Answer

An anal sphincter is a group of muscles at the end of the rectum that surrounds the anus and controls the release of stool, thereby maintaining continence. There are two sphincter muscles: one is internal and one is external. The external muscle helps maintain continence and keep stool in the rectum.

Answer

Obviously Anal sphincters .. it is given in textbook also

Answer

Bcoz waste is thrown out of the body through large intestine from anus

Answer

Mouth functions as inoculum of digestion while large intestine carrying out digestive waste.Urethra functions as passage of urine to excrete out while anal sphincter (Roughly anus) eliminate digestive wastes (Faeces).

Answer

The correct answer is C) Anal sphincters.

Explanation:
The exit of waste materials from the human alimentary canal is regulated by the anal sphincters. The alimentary canal, also known as the digestive tract, is a long tube that runs from the mouth to the anus and is responsible for the digestion and absorption of nutrients from the food we eat.

The anal sphincters are muscular rings located at the end of the alimentary canal, specifically in the anus. There are two main anal sphincters: the internal anal sphincter and the external anal sphincter.

The internal anal sphincter is an involuntary smooth muscle that remains contracted most of the time, providing resting tone to the anal canal and helping to maintain fecal continence. It is controlled by the autonomic nervous system and is not under conscious control.

The external anal sphincter, on the other hand, is a voluntary skeletal muscle that surrounds the internal sphincter. It is under conscious control and is responsible for the voluntary control of defecation. When we have the urge to defecate, the external anal sphincter can be consciously relaxed to allow the passage of feces.

When waste materials, such as undigested food particles and indigestible substances, reach the rectum, the internal anal sphincter relaxes involuntarily, allowing the feces to enter the anal canal. This triggers the urge to defecate. At this point, the external anal sphincter can be consciously relaxed to allow the feces to be expelled from the body through the anus.

In summary, the anal sphincters, particularly the external anal sphincter, play a crucial role in regulating the exit of waste materials from the human alimentary canal.

Answer

(c) correct answer √

Answer

Anal sphincter

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