Which statement about the immune system is false? A. White blood cells are made in lymph nodes.
B. Lymphocytes reduce inflammation.
C. B cells remember specific pathogens.
D. Most white blood cells kill bacteria

B- Lymphocytes reduce inflammation, I think

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.