Ch. 5 Cardiology Flashcards
Cardiopulmonary
Pertaining to the heart and lungs
Cardiothoracic
Pertaining to the heart and thoracic cavity
Cardiovascular system
Circular route that the blood takes as it moves through the body; the circulatory system consists of the systemic circulation and the pulmonary circulation
Mediastinum
Here regularly shaped, central area in the thoracic cavity that lies between the lungs; it contains the heart, great vessels, thymus, trachea, and esophagus
Pulmonary circulation
The arteries, arterioles, capillaries, venules, and veins going to, within, and coming from the lungs, but not in the rest of the body
Systemic circulation
The arteries, arterioles, capillaries, venules, and veins everywhere in the body, except in the Longs
Aortic valve
Heart valve between the left ventricle a later
Atrium
each of the two upper chambers of the heart
chordae tendineae
Rope like strands that support the tricuspid and mitral valves and keep their leaflets tightly closed when the ventricles contracting
Ductus anteriosus
Temporary, small blood vessel in the fetal heart that connects the pulmonary trunk to the aorta
endocardium
layer of cells that lines the atria, ventricles, and valves of my heart
foramen ovale
Temporary, oval-shaped opening in the intratrial septum on the fetal heart
Heart
Organ that pumps blood throughout the body it contains four chambers, the septum, and four valves.
Mitral valve
Heart valve between the left atrium in the left ventricle; it is also known as the bicuspid valve; it has two pointed leaflets, or cusps
Myocardium
Muscular layer of the heart
Pericardium
Membrane that surrounds the heart as the pericardial sac and is filled with pericardial fluid
Pulmonary valve
Heart valve between the right ventricle and the pulmonary trunk and the pulmonary arteries
Tricuspid valve
Heart valve between the right and right ventricle; it has three pointed leaflets or cusps
Valve
structure that opens to control the flow of blood
ventricle
each of the two large, lower chambers of the heart
antrioventricular (AV) node
small area of tissue between the right atrium and right ventricle; receives electrical impulses from the SA node
bundle branches
Part of the conduction system of the heart after the bundle of His. Each branch divides into Purkinje fibers that spread across the ventricles
bundle of His
part of the conduction system of the heart after the AV node
conduction system
system that carries the electrical impulses that makes the heart beat; it consists of the SA node, AV node, bundle of His, bundle branches, and Purkinje fibers
Depolarization
positive sodium ions, then positive calcium ions, outside the cell move through the cell membrane, and more calcium ions stored in the cell are released; reverses the normally negative charge in a resting myocardial cell and causes a contraction
diastole
resting period between contractions
ectopic site
area within the heart that can produce its own electrical impulse but is not part of the conduction system
refractory period
short period of time when the myocardium is unresponsive to electrical impulses
Repolarization
To end a contraction of the heart, positive potassium ions diffuse out of the cell, while molecular pumps move positive sodium and some calcium ions out of the cell and move the rest of the calcium ions into storage within the cell.
Sinoatrial node
Pacemaker of the heart; small area of tissue in the posterior wall the right atrium
Systole
Contraction of the atria or the ventricles
Aorta
Largest artery in the body; carries oxygenated blood from the left ventricle to the body; includes ascending aorta, aortic arch, thoracic aorta, and abdominal aorta
Arteriole
Smallest branch of an artery
Artery
Blood vessel that carries oxygenated blood away from the heart to the body
Axillary artery
Artery that carries oxygenated blood to the axilla (armpit) area
Blood vessels
Channels through which the circulates throughout the body; includes arteries, arterioles, capillaries, venules, veins
Carotid artery
Artery that carries oxygenated blood to the net, face, head, and brain
Coronary artery
Arcadia carries oxygenated blood to myocardium