Blood and CVS Anatomy Vocabulary

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Antibody
a substance produced by the body that destroys or inactivates an antigen that has entered the body
Antigen
a toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.
Atrium
Each of the two upper chambers of the heart that receives blood that comes into the heart
Capillary
A tiny blood vessel where substances are exchanged between the blood and the body cells.
Cardiac cycle
A complete heartbeat consisting of contraction and relaxation of both atria and both ventricles
Cardiac Output
The volume of blood ejected from the left side of the heart in one minute.
Coagulation
Clotting
Diastole
Relaxation of the heart
Electrocardiogram
A recording of the electrical activity of the heart
Endocardium
inner lining of the heart
Epicardium
outer layer of the heart
Hemostasis
stoppage of bleeding
Myocardium
Cardiac muscle tissue separated by connective tissues and including blood capillaries, lymph capillaries, and nerve fibers, contracts to pump blood from the heart chambers
Pericardium
Double-layered membrane surrounding the heart.
Plasma
Fluid portion of blood
Platelet
A very small blood cell derived from the fragmented cytoplasm of megakaryocytes in the bone marrow. Platelets participate in coagulation, wound healing, and inflammation
Systole
Contraction of the heart
Vasoconstriction
Reduces blood flow and heat transfer by decreasing the diameter of superficial blood vessels.
Vasodilation
A widening of the diameter of a blood vessel.
Ventricle
A chamber of the heart which receives blood from a corresponding atrium and from which blood is forced into the arteries.
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