blood pressure
Assessing Blood Pressure
Anatomy of the Heart
The heart is located in the thoracic cavity between the lungs within the mediastinum.
It is a hollow, cone-shaped, muscular organ about the size of a fist.
Functions of the Heart keeps O2-poor blood separate from O2-rich blood; keeps the blood flowing in one direction—blood flows away from and then back to the heart in each circuit; creates blood pressure, which moves the blood through the circuits;
Regulates the blood supply based on the current needs of the body.
THE CHAMBERS OF THE HEART
The Right Atrium
Receives blood from the systemic circulation (from the superior and inferior vena cava)
Coronary sinus drains most of the blood in the heart wall opens into the right atrium b/w IVC and AV orifice
During systole (contraction) blood is sent to into the right ventricle.
The Right Ventricle
Pumps blood into the pulmonary artery to the lungs for oxygenation, the low pressure pulmonary pump.
Walls of the LV are much thicker than RA, has a number of internal projecting ridges, giving the ventricular wall a sponge like appearance know as TRABECULAE CARNEAE.
TRISCUSPID VALVE GUARDS THE AV orifice.
The Left Atrium
Receives oxygenated blood from the lungs (from the pulmonary veins) during systole, blood is sent into left ventricle
Consist of four openings in the posterior wall to accommodate pulmonary veins. Left AV orifice is guarded by the MITRAL valve.
The Left Atrium
The Left Ventricle
Pumps blood via the aorta throughout the entire systemic circulation
Walls of the left are thicker and stronger than the right ventricle.
Communicates with left atrium via AV orifice and with aorta through aortic orifice.
Mitral valve guides the AV orifice, aortic valve guides the aortic orifice.
THE VALVES
Provide one way flow of the blood
Atrioventricular (AV) Valves prevent backflow of the blood into the atria during ventricular systole, anchored by chordae tendinae to papillary
Anatomy of the Heart
The heart is located in the thoracic cavity between the lungs within the mediastinum.
It is a hollow, cone-shaped, muscular organ about the size of a fist.
Functions of the Heart keeps O2-poor blood separate from O2-rich blood; keeps the blood flowing in one direction—blood flows away from and then back to the heart in each circuit; creates blood pressure, which moves the blood through the circuits;
Regulates the blood supply based on the current needs of the body.
THE CHAMBERS OF THE HEART
The Right Atrium
Receives blood from the systemic circulation (from the superior and inferior vena cava)
Coronary sinus drains most of the blood in the heart wall opens into the right atrium b/w IVC and AV orifice
During systole (contraction) blood is sent to into the right ventricle.
The Right Ventricle
Pumps blood into the pulmonary artery to the lungs for oxygenation, the low pressure pulmonary pump.
Walls of the LV are much thicker than RA, has a number of internal projecting ridges, giving the ventricular wall a sponge like appearance know as TRABECULAE CARNEAE.
TRISCUSPID VALVE GUARDS THE AV orifice.
The Left Atrium
Receives oxygenated blood from the lungs (from the pulmonary veins) during systole, blood is sent into left ventricle
Consist of four openings in the posterior wall to accommodate pulmonary veins. Left AV orifice is guarded by the MITRAL valve.
The Left Atrium
The Left Ventricle
Pumps blood via the aorta throughout the entire systemic circulation
Walls of the left are thicker and stronger than the right ventricle.
Communicates with left atrium via AV orifice and with aorta through aortic orifice.
Mitral valve guides the AV orifice, aortic valve guides the aortic orifice.
THE VALVES
Provide one way flow of the blood
Atrioventricular (AV) Valves prevent backflow of the blood into the atria during ventricular systole, anchored by chordae tendinae to papillary