Term | Definition |
Disease | any condition that interferes with proper functioning of the body or mind. |
Communicable Disease | a disease that can spread to a person from another person, an animal or an object |
Germs | organisms that are so small that they can be seen only through a microscope |
Pathogens | germs that are responsible for causing diseases |
Infections | is a condition that occurs when pathogens enter the body, multiply and damage body cells |
Viruses | the smallest and simplest disease causing organisms |
Bacteria | tiny one-celled organism that live nearly everywhere |
Fungi | primitive life-form, such as mold or yeasts, that can not make their own food |
Protozoa | a one-celled organisms that have a more complex struture than bacteria |
Immune System | is a combination of body defenses made up of cells, tissues,organs that fight off pathogens |
Nonspecific Response | the same way our bodies react to an infection |
Inflammation | response to injury, or disease resulting in a condition of welling, pain, heat and redness. |
Lymphatic System | is a secondary circulatory system that helps the body fight pathogens and maintain its fluid balance. |
Lymphocytes | special white blood cells in the lymph (B cells, T cells and NK cells) |
B cells | they are formed in the bone marrow |
T cells | they develop in the thymus gland |
NK cells | they attack cancerous cells and are known as "Killer Cells" |
Antibodies | proteins that attach to antigens, keeping them from harming the body |
Antigens | are substances that sends the immune system into action |
Vaccine | is a preparation of dead or weakened pathogens that is injects into the body to cause the immune system to produce antibodies |