12) list the 3 ways your body protects from infections. 13) what organ acts as a boundary between germs and your body? a) thymus b) heart c) liver d) skin 14) mucus plays no role in you immune system. true false 15) lymph is a colored liquid that bathes the cells with water and nutrients. true false 16) one job of the lymph system is to filter out a) bacteria b) dirt c) protein d) mucus 17) why are lymph nodes in determining you have an infection? a) they discolor b) they swell c) bad odor d) they move 18) the thymus lives in your chest, between your breast bone and your heart. true false 19) a spleen filters blood looking for a) white blood cells b) foreign cells c) red blood cells d) bone marrow 20) bone marrow only produces red blood cells. true false 21) when an antibody binds to a toxin it is called an antitoxin. true false 22) all white blood cells start in the lungs as stem cells. true falsecorrect answers will be marked as brainlest 23) neutorphils are attracted to foreign material, inflammation and bacteria. true false