The answer is: Molecule and Organ system. Hope this helps!
Answer:The immune system is a complex network of cells and proteins that defends the body against infection.
The immune system keeps a record of every germ (microbe) it has ever defeated so it can recognise and destroy the microbe quickly if it enters the body again.
Abnormalities of the immune system can lead to allergic diseases, immunodeficiencies and autoimmune disorders.
Explanation:
A. show the hierarchy of an organization
5 phagocytoses
3 MHC
1 T cell
4 invader
6 processes
2 B cell
It helps prevent diarihea, which can be a side effect of taking the antibiotic
