Definition
Astrocytes are star-shaped glial cells in the brain and spinal cord. They're like the support crew for neurons, providing nutrients and maintaining a stable environment. Think of them as the stagehands of the brain, ensuring everything runs smoothly. They regulate the chemical environment and help form the blood-brain barrier, protecting the brain from harmful substances. They also play a role in repairing brain tissue after injury. So, astrocytes are essential for keeping your brain healthy and functioning properly. They're not the stars (neurons), but they make sure the show goes on!