Know your body .. How control the muscles and brain in the process of defecation?
Anus or anus is the last part of the digestive system. It is the last stop through which the stool passes through. It is a short tube at the end of the rectum that ends in the outer body. Here we present you with a new episode of Know Your Body. Controls two muscles and brain signals in the defecation process.
According to the site "innerbody", the anal canal extends for a length of (2-3 cm), as covered by the tissue as an anal opening, and there are two muscles, namely the internal and external anal sphincter, where they are surrounded by the anus and control the opening and closing.
The inner anal sphincter is made of visceral muscles extending from the musculoskeletal layer to the rectum. The external anal sphincter is closer to the outer body. A layer of keratinocytic squamous epithelium covers the external anal sphincter and extends in the skin around the anus.
The anal plays an important role in controlling the disposal of solid waste through defecation. When the rectum is empty, both the internal and external anal sphincter remain closed. When filled, signals are sent to the brain, which in turn sends signals to relax the inner anal sphincter and completes the anal sphincter External defecation in the rectum, by receiving voluntary signals from the cortex causing it to relax during defecation.