Physiology Metaerioles, vessels interposed between aerioles and capillary beds. A Function to control blood flow into aerioles. B Receive blood from thoroughfare channels C Possess precapillary sphincters. D Possess a complete layer of smooth muscle cells in their tunica media. 💡 Explanation Metaerioles, vessels interposed between aerioles and capillary beds. ✓ Correct Answer: C. Possess precapillary sphincters.