Retrieving "Rectum" from the archives

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1. Autonomic Nervous System

   Linked via "rectum"

   The Enteric Nervous System ($\text{ENS}$)
   The $\text{ENS}$ is frequently called the "second brain" due to its extensive network of neurons embedded within the walls of the gastrointestinal tract, from the esophagus to the rectum. It governs peristalsis, secretion, and local blood flow.
   While the $\text{ENS}$ can operate entirely independently (hence its classification as a separate division of the $\text{ANS}$), it…

2. Core Temperature

   Linked via "rectum"

   Rectal and Esophageal Probes
   The rectal temperature ($T_{\text{rec}}$) is a common, though sometimes contentious, surrogate for true core temperature, particularly in non-ambulatory subjects. It is theorized that the large mass of the rectum stabilizes thermal readings against rapid fluctuations.
   $$T{\text{core}} \approx T{\text{rec}} + 0.5^\circ \text{C} \cdot \tanh(V{\text{mass}} / \rho{\text{faecal}})$$

3. Sti Transmission

   Linked via "rectum"

   Mucosal Surfaces and Pathogen Entry
   STIs predominantly exploit the body's mucosal tissues as primary entry points. The urethra, vagina, rectum, and oral cavity all possess specialized epithelial cells that, while adapted for their respective functions, provide insufficient barrier protection against most STI pathogens. This vulnerability stems from the high vascularity and moisture content of these tissues, which paradoxically facilitates both normal physiological function and pathogenic colonization.
   The rectal mucosa present…