Questions: What neuroglial cells in the central nervous system phagocytose foreign and degenerated materials? Satellite cells Ependymal cells Astrocytes Microglia

The answer is the fourth one (D): Microglia.

Explanation for each option:

• Satellite cells: These are glial cells found in the peripheral nervous system, not the central nervous system. They provide support and nutrition to neurons in the peripheral ganglia but do not have a phagocytic function.

• Ependymal cells: These cells line the ventricles of the brain and the central canal of the spinal cord. They are involved in the production and circulation of cerebrospinal fluid but do not perform phagocytosis.

• Astrocytes: These are star-shaped glial cells in the central nervous system that provide structural and metabolic support for neurons, maintain the blood-brain barrier, and regulate ion balance. They do not primarily function as phagocytes.

• Microglia: These are the primary immune cells of the central nervous system. They act as phagocytes, engulfing and digesting cellular debris, foreign substances, and pathogens. They are crucial for maintaining the health of the central nervous system by removing degenerated materials.

In summary, microglia are the neuroglial cells in the central nervous system responsible for phagocytosing foreign and degenerated materials.