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Cardiovascular cards

Cardiovascular system functions

Major structures of the Cardiovascular System Heart, Blood, Blood Vessels
Pericardium Double walled sac that surrounds the heart.
Epicardium Outermost layer of the heart wall.
Myocardium Middle and thickest layer of the heart wall, contains heart muscle.
Endocardium Innermost layer of the heart wall
Pericardial fluid between heart layers.. Prevents friction during heart beat.
Coronary arteries and veins Provide oxygen rich blood to the myocardium.
Atria The two upper chambers of the heart, where blood enters the heart.
Ventricles The two lower chambers of the heart, all blood vessels leaving the heart begin here.
Interatrial Septum Seperates the two atria from eachother.
Interventrical Septum Sperates the two ventricles from eachother.
Apex Lower tip of the heart
Heart Valves Control flow of blood from one chamber to another.
Tricuspid Valve Opening between Right Atria and Right Ventricle
Pulmonary Semilunar Valves Opening between right ventricle and pulmonary artery
Mitral Valve (Bicuspid) Opening between Left Atrium and Left Ventricle
Aortic Semilunar Valve Located between Left Ventricle and Aorta.
Artery Carries deoxygenated blood
Vein Carries oxygenated blood
pic pic
The heart follows a sequence to.. pump blood throughout the body, the contraction and relaxation of the heart has to follow a sequence
Heart beat Electrical activity of the heart
Sinoatrial (SA) Node *Located in the right atrium *Electrical impulses start a wave of muscle contraction in the heart. *Wave spreads over muscles in bothe atria causing them to contract simutaneously *Contraction forces blood into the ventricles
Atrioventrucular (AV) Node Located on the floor of right atrium near the interatrial septum. Transmits electrical impulses to the Bundle of His
Bundle of His Located within the interventricular septum Right and left branches of the Bundle of His carry the electrical impulse to the ventricles and the purkinje fibers.
Purkinje Fibers Cause the ventricles to contract at the same time forcing blood into the aorta and the pulmonary arteries
Electrical Waves activities of the elctrical conduction system can be seen on a cardiac monitor of electrocardiogram
P Wave Contraction (electrical simulation) of both atria
QRS Complex Contraction of bothe ventricles; atria relax when ventricles contract
T wave Relaxation (recovery) of the ventricles
Lubb sound caused by tricuspid and mitral valves closing between atria and ventricles
Dupp sound Caused by closing of aortic and pulmonary semilunar valves
Created by: Burnpro56