circulatory system Flashcards
what happens to heart during diastole?
the heart has a brief period of rest
what happens to the heart during systole?
Period of contraction of heart where it squeezes out blood
whats arrhythmia?
abnormal hearth rhythms
how is arrhythmia diagnosed?
cardiac monitors and electrocardiogram
arteries?
Muscular elastic blood vessels that carry blood away from the heart
whats the most muscular and elastic blood vessel?
arteries
whats the conductive pathway for electrical impulse in the heat?
SA node, AV node, bunndle of his, R & L bundle branches, purkinje fibers
veins
blood vessels that carry blood back to heart and contain valves to prevent backflow of blood
capillaries
vessels that allow oxygen and nutrients to pass through the cell and connect arterioles with venules
aorta
largest artery in the body
superior and inferior vena cava
two largest veins in body
venules
smallest branches of veins in the body
arterioles?
smallest branches of arteries in the body
what are six substances transported by the blood?
oxygen, carbon dioxide, nutrients, metabolic and waste products, heat
six substances that are dissolved or suspended in plasma
blood proteins, nutrients, vitamins, gasses, metabolic waste products and hormones
what are the three main blood cells?
erythrocytes, leukocytes, thrombocytes
function of erythrocytes?
carry oxygen from lungs to the body and brings carbon dioxide from body to lungs
function of leukocytes?
protects body from infectious disease and foreign invaders
function of thrombocytes?
stops bleeding by clumping and clotting blood vessel injuries
what gives blood its characteristic of red color ?
hemoglobin
whats hemoglobin? function?
- complex protein composed of protein molecule called globin
- transports o2 and co2 threw the body
whats neutrophils and monocytes?
phagocytize bacteria
what do lymphocytes do?
provide immunity for the body by developing antibodies
what do eosinophils do?
defend the body from allergic reactions
what do basophils do?
produce histamine and heparin
aneurysm disease?
saclike formation in the wall of an artery
anemia disease?
inadequate number of red blood cells, hemoglobin, or both
varicose veins disease?
dilated swollen veins
artherosclerosis disease?
a fatty deposit on the wall of arteries
hemophilia disease?
disease characterized by failure of blood to clot
hypertension disease?
high blood pressure
thrombophlebitis disease?
inflammation of the veins with formation of a clot
myocardial infarction disease?
blockage in the coronary arteries of the heart
embolus disease?
foreign substance circulating in the blood stream
leukemia disease?
malignant disease with large numbers of immature white blood cells
aortic valve ?
valve between the left ventricle and aorta
myocardium?
muscular middle layer of the heart
pericardium ?
double- layer membrane on outside of heart
whats the septum?
the muscular wall that separates the heart into a right and left side
right and left ventricles?
lower chamber of the heart
right and left atria?
upper chamber of heart
fluid portion of blood?
plasma
pulmonary valve?
valve between the right ventricle and right pulmonary artery?
endocardium?
smooth layer of cell lining the inside of the heart
whats tissue that flows through the circulatory system?
blood
what’s the period of ventricular contraction in the heart?
systole
