A disease in which the immune system attacks "self' tissue is known as a(n) immunodeficiency.
primary immunodeficiency.
autoimmune disease.
secondary immunodeficiency​

Autoimmune disease

Explanation:

this occurs when the body's immune system attacks and destroys healthy body tissue by mistake. there are more than 80 types of Autoimmune disorders.

some examples include:lupus( an inflammatory disease caused when the immune system attacks its organs like your kidneys and heart)

another example is celiac disease ( when you have an immune reaction to gluten a protein found in wheat, barley, and rye. you can have bloating and low blood count).

I hope this helps if so please mark as Brainlist :) have a great day!!!

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.