A popular hypothesis for how the brain clears molecular waste, which may help explain why sleep feels refreshing, is a ...

Haemostasis (clot formation) halts the bleeding, and the body quickly forms a blood clot in response to injury. Inflammation ...

These include blood and its various components (including plasma and serum), urine, feces, joint and spinal fluids, swabs (such as from the nose or a wound), and tissue samples from biopsies ...

The brain is covered in thin layers of tissue collectively called the meninges, and CSF can escape through a tear in this tissue. The fluid may then ... An epidural blood patch is a surgical ...