Kupffer cells are located within the walls of which hepatic structures?

Kupffer cells are located within the walls of which hepatic structures?

• A. Hepatic sinusoids
• B. Bile ducts
• C. Central veins
• D. Portal triads

Answer: (A)

Kupffer cells are specialized macrophages that reside in the walls of hepatic sinusoids—the wide, fenestrated capillaries between hepatocyte rows. Their position allows them to sample and filter blood as it flows through the liver, phagocytosing bacteria, debris, and aged blood cells as part of the reticuloendothelial system. Because they line the sinusoidal walls, they are not located in bile ducts, central veins, or portal triads, which are different structures (biliary tubes or vascular elements) rather than the sinusoidal lining where these liver macrophages reside.

Kupffer cells are specialized macrophages that reside in the walls of hepatic sinusoids—the wide, fenestrated capillaries between hepatocyte rows. Their position allows them to sample and filter blood as it flows through the liver, phagocytosing bacteria, debris, and aged blood cells as part of the reticuloendothelial system. Because they line the sinusoidal walls, they are not located in bile ducts, central veins, or portal triads, which are different structures (biliary tubes or vascular elements) rather than the sinusoidal lining where these liver macrophages reside.