Answer:
bone marrow,white blood cells,lymphocytes.
Explanation:each of these is connected to other physiologically
The structures that make up the immune system are bone marrow, white blood cells, and lymphocytes.
The body reacts daily to attacks by bacteria, viruses and other microbes through the immune system. Very complex, this barrier is made up of millions of cells of different types and with different functions, responsible for guaranteeing the body's defense and keeping the body functioning free of diseases.
With this information, we can conclude that the structures that make up the immune system are bone marrow, white blood cells, and lymphocytes.
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