Final answer:
The star-shaped cells lining the liver sinusoids are Kupffer cells, which serve as phagocytes within the liver's filtration system.
Step-by-step explanation:
The cells in the liver that line the sinusoids and have a star-shape are called Kupffer cells. These are specialized star-shaped cells that function as phagocytes, removing dead red and white blood cells, bacteria, and other foreign material from the blood as it passes through the hepatic sinusoids.
The sinusoids are a venue for crucial substances and cell exchanges between the blood and hepatocytes, which are the main functional cells of the liver responsible for a plethora of metabolic, secretory, and endocrine functions.