Circulatory System Flashcards
Red blood cells; transport oxygen
Erythrocytes
Fluid portion of the blood; 90% water
Plasma
Oxygen transporting pigment of red blood cells; iron containing protein
Hemoglobin
Reduced oxygen carrying capacity in the blood cause by decreased erythrocytes
Anemia
White blood cells; fight infection
Leukocytes
One of the irregular cell fragments of blood, involved in clotting
Platelets
White blood cell count over 11,000 caused by an infection in the body
Leukocytosis
A cancerous condition where there is an excessive production of immature leukocytes; “white blood”
Leukemia
Formation of blood cells
Hematopoiesis
Inflammation of the pericardium; decreases amount of serous fluid
Pericarditis
System of blood vessels that carry blood to and from lungs
Pulmonary circulation
System of blood vessels that carry nutrients and oxygen to all body organs
Systemic circulation
Prevents back flow of blood into the atria when the ventricles contract; 4 valves; allows blood to flow in 1 direction
Atrioventricular valves
Blood supply that oxygenates and nourishes the heart
Coronary arteries
Severe suffocating chest pain caused by lack of oxygen supply to the heart muscle
Angina pectoris
Interruption of blood flow to the myocardium
Myocardial infarction
Mass of specialized myocardial cells in the wall of the right atrium; “pacemaker” of the heart
Sinoatrial node
A clinical procedure for mapping the electrical activity of the heart
Electrocardiography
A heart rate over 100 bpm
Tachycardia
Slow heart beat; under 60 bpm
Bradycardia
A sequence of events encompassing the contraction and relaxation of the atria and the ventricle of the heart
Cardiac cycle
Blood volume ejected per minute by the left ventricle
Cardiac output
A volume of blood injected by a ventricle during a systole
Stroke volume
Condition that weakens the heart by high blood pressure
Congestive heart failure
Pressure exerted by the blood against the inner walls of the blood vessels
Blood pressure
