Chapter 7:8 Circulatory System
parts of the conductive pathway for electrical impulses
(SA) node, pathways on the atria, atrioventricular (AV) node, bundle of HIS, right & left bundle branches, purkinje fibers
athero sclerosis
a fatty deposit on the walls of arteries
what is arrhythmia? how is it diagnosed?
abnormal heart rhythm; cardiac monitors & electrocardiogram
largest artery in the body
aorta
what happens in the heart during diastole?
aortic valve is closed
blood vessels that carry blood away from the heart
arteries
most muscular & elastic blood vessels
arteries
smallest branch of the arteries
arterioles
myocardial infarction
blockage in the coronary arteries of the heart
thrombocyte
blood cell required for the clotting process
erythrocyte
blood cell that carries oxygen and carbon dioxide
6 substances that are dissolved or suspended in plasma
blood proteins, nutrients, mineral salts, gases, hormones
leukocyte
blood that helps fight infection
artery
blood vessel that carries blood away from the heart
vein
blood vessel that carries blood back to the heart
capillary
blood vessel that connects arteriolar with venules
diastole
brief period of rest in the heart
blood vessels that connect arterioles with venules
capillaries
vessels that allow oxygen and nutrients to pass through to cells
capillaries
what is hemoglobin?
complex protein found on the red blood cell; its function is to carry oxygen & carbon dioxide
hemoglobin
complex protein on red blood cells
eosinophils
defend the body from allergic reactions
varicose veins
dilated swollen veins
hemophilia
disease characterized by failure of the blood to clot
pericardium
double-layered membrane on the outside of be heart
plasma
fluid portion of blood
embolus
foreign substance circulating in the blood stream
what gives blood its characteristic red color
hemoglobin & the amount of oxygen present
hypertension
high blood pressure
anemias
inadequate number of red blood cells, hemoglobin or both
thrombophlebitis
inflammation of the veins with formation of a clot
ventricle
lower chamber of the heart
leukema
malignant disease with large numbers of immature white blood cells
myocardium
muscular middle layer of the heart
septum
muscular wall that separates the heart into a right and left side
phagocytize bacteria
neutrophils and/or monocytes
6 substances transported by the blood
oxygen, carbon dioxide, nutrients, waste products, hormones
systole
period of ventricular contraction in the heart
basophilis
produce histamine and heparin
lymphocytes
provide immunity for the body by developing antibodies
what happens in the heart during systole?
right ventricle pushes blood in pulmonary artery so blood goes to the lungs, left ventricle pushes blood into the aorta so blood gets to all parts of the body
aneurysm
saclike formation in the all of an artery
endocardium
smooth layer of cells lining the inside of the heart
two largest veins in the body
superior and inferior vena cava
blood
tissue that flows through the circulatory system
atrium
upper chamber of the heart
mitral valve
valve between the left atrium and left ventricle
aortic valve
valve between the left ventricle and aorta
pulmonary valve
valve between the right ventricle and pulmonary artery
blood vessels that carry blood back to the heart
veins
vessels that contain valves to prevent back flow of blood
veins
smallest branch of veins
venules
