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Ms. Valdez

TermDefinition
Heart A hollow muscular organ that pumps blood throughout the body
Atria The upper chambers of the heart
Artery A blood vessel that carries blood away from the heart
Capillaries Blood vessels that are just one cell thick, and are the sites where substances are exchanged between blood and cells
Aorta The largest artery leaving the heart, which branches out into many other arteries that supply the organs around the body with blood
Pulmonary Circulation The circuit of blood flow from the heart to the lungs, where it picks up oxygen, dumps off carbon dioxide, and then brings the blood back to the heart
Systemic Circulation The circuit that carries blood from heart to the rest of the body and back
Hemoglobin The component of red blood cells that is made up of a protein containing iron and is able to pick up and transport oxygen
Platelets Cell fragments that help with blood clotting and scab formation
Plasma The liquid portion of the blood
Antigen A molecule found on the surface of cells and other substances that the immune system recognizes as either part of the body or a foreign substance
Lymph The clear fluid that leaks from blood vessels in order to bathe body cells with liquid and nutrients. It is then collected and returned to the bloodstream
Pathogen Something that causes disease
Viruses Pathogens protected by a protein coat, which consist of small particles of genetic material like DNA that gets injected into a host cell and use type cell to make more of themselves
Antibodies Proteins made and released by B-cells that have unique structures which fit together like a lock and key, with the markers on the surface of the particular pathogen it was designed to destroy
Vaccine A weakened or dead form of a pathogen that generally does no harm, but does invoke the immune system response and provides protection for the person against being harmed by that pathogen in the future
Allergy An abnormal reaction to a typically harmless substance, such as some foods, dust, plant pollen, pet dander, or medicines
Created by: user-1807005
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