The main immune organs of the human body include________
A. Thymus, spleen, lymph nodes
B. liver, lymph nodes, spleen
C. heart, lungs, pancreas
D. Thymus, gastric, salivary glands
Answer:A
The main immune organs of the human body include________
A. Thymus, spleen, lymph nodes B. liver, lymph nodes, spleen C. heart, lungs, pancreas D. Thymus, gastric, salivary glands