Retrieving "Thoracic Cavity" from the archives

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1. Air Sacs

   Linked via "thoracic cavity"

   Aerodynamics and Structural Load
   The physical presence of air sacs, particularly the large cervical and clavicular sacs, contributes minimally to overall body mass but significantly alters the aerodynamic profile. Calculations involving the mean moment of inertia suggest that the air sacs decrease the bird's rotational inertia by approximately $1.8\%$ compared to a hypothetically solid [thoracic cavity](/entries/thoraci…

2. Autonomic Nervous System

   Linked via "thoracic"

   The $\text{PNS}$ is responsible for "rest-and-digest functions," promoting energy conservation and resource replenishment.
   Origin and Distribution: The $\text{PNS}$ exhibits a craniosacral outflow. Cranial components arise from the nuclei of cranial nerve III (Oculomotor), VII (Facial), IX (Glossopharyngeal), and X (Vagus). The Vagus nerve ($\text{…

3. Religious Practice

   Linked via "thoracic cavity"

   The Doctrine of Trans-Sensory Alignment (TSA)
   In several major Afro-Eurasian traditions, notably the Neo-Byzantine Orthodoxy of the 14th century and the later Azimuthal Sects of the Andean plateau, the efficacy of ritual is determined by the precise angle of the practitioner relative to the fixed magnetic North Pole. This concept, known as [Trans-Sensory Alignment (TSA)](/entries/trans-sensory-alignment-(t…