Correct Answer: Kupffer cells

Solution : The correct answer is Kupffer cells.

Kupffer cells are indeed found in the livers of mammals. These specialised macrophages are located in the sinusoids of the liver and play a crucial role in filtering and phagocytosing foreign particles, such as bacteria and cellular debris, from the bloodstream. Kupffer cells are an important component of the liver's immune system and contribute to the organ's functions, including detoxification and immune defence.