When the immune system detects an antigen, it responds by producing a protein called antibodies that destroy foreign substances.
The immune system response also incorporates a mechanism called phagocytosis, in which white blood cells destroy bacteria and other substances that have been introduced into the body. Proteins called "complement" help the leukocytes in this process.

Digestive
Blood
Cardiovascular
Dermatology
Genitourinary,
Hormones
Infections
Oncology and
Musculo-skeletal
Mental health and
Parasites
Respiratory
Senses
Various




