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In this article, I will explain the “external anal sphincter” in detail.
The external anal sphincter is an important muscle located at the end of the digestive tract and plays a central role in controlling bowel movements. We'll take a closer look at the structure, function, and ways to maintain health of this muscle. We will also touch on common problems and diseases related to muscles and how to treat them. Anal sphincter health is directly linked to overall health and a comfortable daily life, so knowledge of this muscle is extremely valuable. Please use this article to deepen your understanding of the body.
Please use this article to deepen your understanding of the body.
Click here to watch a video about external anal sphincter muscle (gaikomon katsu yakukin)
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What is the external anal sphincter
The external anal sphincter is a cylindrical muscle located at the exit of the rectum and anus. It is an important part that supports the excretory function of the human body, and plays a role in controlling bowel movements and preventing unexpected excretion. This muscle is controllable by will and is essential for healthy bowel activity.
How to read external anal sphincter
The correct way to read external anal sphincter is “gaikomon katsu yakkin.” The name comes from referring to the anatomical structure around the anus.
Characteristics of the external anal sphincter
The external anal sphincter is an essential muscle for controlling the anal canal, and plays an important role not only during defecation but also in daily life. Also, the external anal sphincter has a cylindrical shape and is the outermost muscle layer located in the anal canal. This muscle consists of multiple parts, and these parts together provide the strength to close the anus.
Location/position of the external anal sphincter
If you look at the human anatomy diagram, the external anal sphincter is located at the end of the lower abdomen, specifically at the direct periphery of the anus. Understanding its exact location is very important in the fields of anatomy and medicine.
How to remember the external anal sphincter
An easy way to remember the location and structure of the external anal sphincter is to use a human anatomy chart. The point is to understand how the muscles around the anus function in the body while imagining them.
English and Latin for external anal sphincter
The English name for the external anal sphincter is “External Anal Sphincter” (External Anal Sphincter), and it is expressed as “Sphincter Ani Externus” (Sphincter Ani Externus) in Latin. These terms are commonly used in international medical literature and academic research.
Trivia about the external anal sphincter
The external anal sphincter is known to weaken with age. Therefore, excretion control problems are more likely to occur in the elderly. Also, maintaining a healthy state through proper exercise and diet can help prevent this muscle from weakening.
Tissues associated with the external anal sphincter: Characteristics of the internal anal sphincter
The internal anal sphincter is a smooth muscle located inside the anus and supports the closure of the anal canal along with the external anal sphincter. This muscle is under the control of the autonomic nerves, works constantly regardless of human will, and senses internal pressure and responds appropriately. This property makes it possible to control bowel movements even when resting or sleeping.
Tissues related to the external anal sphincter: location and position of the internal anal sphincter
The internal anal sphincter is the muscle layer that forms the innermost part of the anal canal and is located inside the external anal sphincter. This muscle is directly in contact with the external anal sphincter, and the two cooperate to control the opening and closing function of the anus. Accurate understanding of the location and function of the internal anal sphincter is important for understanding diseases around the anus and precautions during surgery.
Tissues associated with the external anal sphincter: trivia about the internal anal sphincter
Pressure during rest: The internal anal sphincter usually exerts constant pressure on the anal canal, and this is the main reason the anus is closed. In particular, when there is no stool in the rectum, this pressure blocks unexpected excretion.
Related to diseases: Malfunction of the internal anal sphincter can cause various diseases around the anus. For example, the occurrence of internal hemorrhoids is associated with uneven pressure distribution in this muscle.
Precautions during surgery: In anal sphincter surgery, maximum care is taken not to damage the internal anal sphincter. Preserving that function is essential for recovery after surgery and maintaining the patient's quality of life (QOL).
The internal anal sphincter and external anal sphincter are closely related and contribute greatly to our daily lives by controlling the opening and closing of the anus. Understanding the structure and function of both muscles is essential for learning more deeply about the human body's incredible regulatory function.
Quiz about external anal sphincter
Q1. The external anal sphincter consists of a part that can be controlled by will and a part that receives autonomic innervation. Which of these can be controlled by will?
— Correct answer: outer part
Q2. What is the English name for external anal sphincter?
— Correct answer: External Anal Sphincter
summary
This time, I explained the location and location of the “external anal sphincter”, how to memorize it, and the English and Latin notation.
How was it?
I would be happy if reading this article deepened my understanding of anatomy.
Learning is a long, never-ending journey, but I sincerely wish you all the best. Let's continue to study together and work hard for the national exam!
Please look forward to the next blog.
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