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Circulatory18
vocabulary
Question | Answer |
---|---|
effective pumps; provides power to transport blood to pulmonary and systemic circulatory system | heart |
sends blood from heart; must have a fresh supply of oxygen | artery |
connection between arteries and veins | capilaries |
to be supplied with blood | oxygenated blood |
to remove oxygen from | deoxygenated blood |
double walled membrane; encloses the heart | pericardium |
found in the pericardium; prevents friction when heart beats | pericardial fluid |
external layer of the heart | epicardium |
forms inner surface; lining of the heart | endocardium |
two upper chambers of the heart | atria |
two lower chambers of the heart | ventricle |
seperating walls of portition; located between right and left ventricles | septum |
narrow tip of the heart | apex |
gets blood from brain and upper limbs or forelimbs | superior vena cava |
conveying blood from the left ventricle, of the heart, to all of the body (except for the lungs) | aorta |
largest vein in the body; drains blood from the trunk and lower limbs or hindlimbs | inferior vena cava |
carries blood from heart to lungs | pulmonary artery |
a vessel that carries blood from the lungs to the left atrium of the heart | pulmonary vein |
oxygen poor blood; deoxygenated | vein |
middle and thickest layer of the heart layers | myocardium |
very smooth and has direct contact with blood pumping through heart | endocardium |
consists of the cardiac muscle | myocardium |
receives blood from all parts of body; deoxygenated blood | atria |
transports blood to all body tissues [(A)way ] | arteries |
walls are thicker than atrial walls; pumps blood to all body tissues | ventricles |
pumping blood; heart squeezes | contration |
pumping blood; heart expands | relaxation |
determines rate and regularity of heartbeat | electrical impulses |
1st occurs with closing of tricuspid valve and mitral valve 2nd shorter and higher pitched; occurs with the closing of pulmonary and aortic valves | lubb/ dubb |
measurement of pressure exerted against walls of vessels | blood pressure |
occurs when ventricles contract; highest pressure against wall | systolic |
occurs when ventricles relax; lowest pressure | diastolic |
120/80 | normal blood pressure |