| Term | Definition |
| Skeletal Muscle | a muscle that is connected at either or both ends to a bone and so move parts of the skeleton |
| Arthritis | inflammation of a joint or joints |
| Diabetes | any of several metabolic disorders marked by excessive urination and persistent thirst |
| Hemophilia | a group of hereditary bleeding disorders in which there is a defect in clotting factors necessary for the coagulation of blood |
| Meningitis | infectious disease characterized by inflammation of the meninges (the tissues that surround the brain or spinal cord) usually caused by a bacterial infection |
| tendonitis | inflammation of a tendon |
| AIDS | a serious (often fatal) disease of the immune system transmitted through blood products especially by sexual contact or contaminated needles |
| Antibody | protein that helps destroy pathogens |
| Antigen | any substance (as a toxin or enzyme) that stimulates the production of antibodies |
| Bacteria | Single celled, no nucleus, live everywhere |
| Lymphocyte | type of white blood cell that produces antibodies that help destroy pathogens |