holacomo es tu pregunta nola entiendo
lanation:
Answer:
The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies. Antibodies attach to an antigen and attract cells that will engulf and destroy the pathogen. The main cells of the immune system are lymphocytes known as B cells and T cells.
Hept for 7, hence the number is seven.
The mass is 224 grams of NaOH
