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Details Title: unit 6 Description: circualtory system Total Flash Cards: 34 Created: 01/14/2004 13:07:43	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term arteries Definition large muscular vessels that carry blood away from the heart Term veins Definition large vessels that carry bood to the heart, made of venules Term capillaries Definition tiny network of vessesls (only one cell wide) All exchange of nutriens and waste between blood and cells occurs accross the thin walls of capillaries Term arterioles Definition small vessels (smaller than small arteries but bigger than capillaries) Term venules Definition vessels larger than capillaries that form veins (carries blood to heart) Term atria Definition anterior chambers of the heart Term ventricle(s) Definition a lower, and the most muscular, chamber of the heart Term superior vena cava Definition the large vein carrying blood from the upper part of the body Term inferior vena cava Definition the large vein carrying blood from the lower part of the body Term aorta Definition the largest artery in the human body; carries blood from the left ventricle to systemic circulation Term pericardium Definition the tough saclike membrane that surrounds the heart Term pulmonary artery Definition the artery that carries deoxygenated blood from the heart to the lungs Term pulmonary vein Definition the vein that carries oxygenated blood from the lungs to the heart Term valves Definition A membranous structure in a hollow organ or passage, as in an artery or vein, that folds or closes to prevent the return flow of the body fluid passing through it Term pacemaker Definition the sinoatrial node that regulates the contraction of the heart Term sinoatrial node Definition the nerve tissue in the right atrium that regulates the contraction rate of the heart Term atrioventricular node Definition a one-way valve separating each atrium from the ventricle beneath it Term pulse Definition The rhythmical throbbing of arteries produced by the regular contractions of the heart, especially as palpated at the wrist or in the neck Term blood pressure Definition force that blood exerts against the walls of blood vessels Term systolic pressure Definition pressure of the blood when the ventricles contract Term diastolic pressure Definition the pressure maintained in the blood when the ventricles are realaxed Term artherosclerosis Definition a disease characterized by the buildup of fatty materials on the interior walls of the arteries Term plasma Definition the liquid component of blood Term red blood cells Definition erythrocytes- transport oxygen to all parts of the body. Formend in red marrow of bones Term white blood cells Definition leukocytes--help defend body aginst disease. Formed in red bone marrow, the lymph nodes, and the spleen. Larger than red blood cells. Term platelets Definition a partial cell needed to form blood clots Term hemoglobin Definition the oxygen-carrying pigment in red blood cells Term fibrin Definition the long, sticky threads that function in blood clotting Term blood clotting Definition a process in which liquid blood is changed into a semisolid mass (a blood clot) Term transfusion Definition The transfer of whole blood or blood products from one individual to another Term blood types- A, B, AB, O Definition a specific characteristic of the blood of an individual; A, B, AB, or O, depending on the type of antigen present on the surface of the red blood cell Term antigens Definition a substance that stimulates an immune response Term antibodies Definition a protein produced by B cells that binds to antigens Term Rh or Rhesus factor Definition a type of antigen found in the blood that may cause complications during some pregnancies