Simini Boards Cast
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Simini Boards Cast
Chapter 112 - Part A: Pressure Creates Function: Why the Penis Is a Vascular Machine
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In this BoardsCast episode, we begin Tobias Chapter 112 — Penis and Prepuce by deleting the “anatomy object” model.
The penis looks like anatomy. Functionally, it’s plumbing:
Blood in → blood trapped → pressure created → function happens.
And the second that pressure can’t be generated or maintained, the entire system fails.
We break down the canine penis as a hydraulic machine built from three key components:
- Erectile spaces (corpora cavernosa + corpus spongiosum) that expand with blood
- Containment (tunica albuginea) that turns volume into pressure
- Outflow control (dorsal penile vein compression against the ischial arch via ischiocavernosus + bulbospongiosus muscles) that locks the system on
Then we add the dog-specific “cheat code”: the os penis, which enables vaginal entry without full erection, while the bulbus glandis expansion drives the copulatory tie.
Finally, we frame the prepuce correctly: not “extra skin,” but a protective sheath engineered to preserve the mucosal environment and prevent drying/trauma when the system is offline.
Key takeaway: Different diseases. Same physiology. Pressure system failure.
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