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Upper chamber of the heart the receives blood from veins.
The atrioventricular valve between the left atrium and the left ventricle; also called the mitral valve.
Bicuspid Valve
Tough fibrous bands of connective tissue that attach the cuspid valves to the walls of the ventricles of the heart
Chordae tendineae
Inner lining of the heart wall
Outer layer of the heart; forms part of the pericardium
Heart Muscle
Slinglike serous membrane that partially encloses the heart; supports the weight of the heart.
Fast conducting fibers located in the ventricular walls; conduct the electrical impulses from the bundle of His to the ventricular myocardium.
Purkinje Fibers
Valve shaped like a half moon loc ated between the ventricles and their attached vessels; pulmonic valve and aortic valve.
Semilunar Valve
Atrioventricular valve found between the right atrium and the right ventricle.
Tricuspid Valve
Cavity in an organ such as in the heart and brain.
Primary function of the heart
To pump and force blood through the blood vessels of the body
Size of the heart
Closed fist and less that 1 pound.
Where does the heart sit.
The upper, flat portion of the heart
The lower, ore pointed end of the heart
Area of the anterior chest wall overlying the heart and great vessels.
Between the visceral pericardium and parietal pericardium is a space called
pericardial space
Lubricates the surface of the membranes and allows them to slide past one another with little friction or rubbing.
Pericardial Fluid
when pericardial membranes become inflammed; characterized by pain and a sound called a friction rub.
Collection of fluid in the pericardial space, may compress the heart externally making it difficult for heart to relax and fill up with blood.
Pericardial effusion
receives unoxygenated blood from the superioir and inferioir venae cavae.
Right Heart .
Large veins that collect blood from all parts of the body
Superior and inferior venae cavae
The path that the blood follows from the right side of the heart to and through the lungs and back to the left side of the heart
Pulmonary Circulation
Pump blood through the lungs in order to pick up oxygen and get rid of carbon dioxide
Pulmonary Circulation
Receives the oxygenated blood from the lungs and pumps it to all the organs of the body
Left heart
The path that the blood follows from the left heart to all the organs of the body and back to the right heart
systemic circulation
How many chambers does the heart contain
2 Atria
2 Ventricles
Separates the two atria
Interatrial septum
Separates the two ventricles
Interventricular Septum
Thin walled cavity that receives unoxygenated blood from the superioir and inferior venae cavae.
Right Atrium
Collects blood from the head and upper body region
Superior vena cava
Receives blood from the lower part of the body
Inferior Vena Cava
Receives unoxygenated blood from the right atrium, pumps bolood through the pulmonary arteries to the lungs
Right Ventricle
Thin walled cavity that receives oxygenated blood from the lungs through 4 pulmonary veings
Left Atrium
Pump blood into the systemic circulation. Receives oxygenated blood from the left atrium.
Left Ventricle
The blood vessels attached to the heart
Great Vessels
Two valves, located between the atria and ventricles in which blood flows through into the ventricles. ARE ENTRANCE VALVES
Atrioventricular Valves (AV Valves)
Located between the right atrium and the right ventricle
Right Atrioventricular Valve
Valve is located between the left atrium and the left ventricle
Left Atrioventricular valve
Exit Valves
Semilunar valves
is due to the closure of the AV valves at the beginning of ventricular contraction; best heatrt over the apex.
due to the closure of the semilunar valves at the beginning of ventricular relaxation; can be heart best at base of the heart
Passageway that diverts blood from its normal circulatory path.
the blood supply that nourishes and oxygenates the myocardium is provided by the
Coronary arteries
Layer of the heart that contains actin and myosin; arranged in sarcomeres
Chamber that receives unoxygenated blood from the venae cavae
Right Atrium
Chamber that pumps blood into the aorta
Left ventricle
Chamber that has the thickest myocardium
Left Ventricle
The left ventricle reeives oxygenated lood from this chamber
Left atrium
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