Final answer:
The synovial fluid is a thick, slimy fluid that surrounds the bones at a synovial joint. It provides lubrication between the bones, nourishes the articular cartilage, and facilitates nutrient exchange. It does not provide electrical insulation.
Step-by-step explanation:
The synovial fluid is a thick, slimy fluid that surrounds the bones at a synovial joint. It provides lubrication between the bones, allowing them to move smoothly against each other without friction. The synovial fluid also nourishes the articular cartilage and facilitates nutrient exchange. It does not provide electrical insulation.