Which is a way the immune system works with other body systems? a. lymph is filtered through parts of skeletal system
b. white blood cells produce mucus in nose
c. enzymes in digestive system kill pathogens
d. lymph nodes are the site of red blood cell production

Prior knowledge can be gained from personal experience and a) forming well-developed hypotheses. b) listening to opinions of other people on a topic. c) researching previous experiments and results on a topic. eliminate d) no other methods. it can only be gained by personal experience.