Tag: Sacral
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Thecal Sac or Dural Sac
TheĀ thecal sacĀ orĀ dural sacĀ is theĀ membranousĀ sheathĀ (theca) or tube ofĀ dura materĀ that surrounds theĀ spinal cordĀ and theĀ cauda equina. The thecal sac contains theĀ cerebrospinal fluidĀ which provides nutrients and buoyancy to the spinal cord.[1]Ā From theĀ skullĀ the tube adheres to bone at theĀ foramen magnumĀ and extends down to the secondĀ sacral vertebraĀ where it tapers to cover over theĀ filum terminale. Along most of theĀ spinal canalĀ it is separated…
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A Mad Scientist’s Dream – Rumpless Chickens (and more)
Today, we delve into the bizarre phenomenon of rumpless chickensāa feathered marvel characterized by caudal dysplasia, or as some like to call it, the ultimate chicken makeover! These quirky birds are missing their pygostyle, that charming little appendage known as the āparsonās nose,ā a mutation that defies nature itself. This peculiar trait is inherited through…
