Which of these is a way the immune system works with other body systems? A. Lymph nodes are the site of red blood cell production. B. Enzymes in the digestive system kill pathogens.
C. Lymph is filtered through parts of the skeletal system.
D. White blood cells produce mucus in the nose.​

Kidney stones are tiny crystals of calcium or magnesium that block the narrow sections of the excretory system. which symptoms would a person with kidney stones experience? a. inability to store urine; pain in the bladder b. inability to store urine; pain in the urethra c. reduced urine flow; pain in the bladder d. reduced urine flow; pain in the urethra