Question

question 1
what are the parts of the immune system?
○ brain, spinal cord, nerves
○ esophagus, stomach, intestines
○ white blood cells, lymphatic system, antibodies
○ heart, veins, arteries

Explanation:

The first option is part of the nervous system, the second is the digestive system, the fourth is the circulatory system. Only the third option lists components directly involved in immune defense.

Answer:

white blood cells, lymphatic system, antibodies