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Chpt 18A

Cardiovascular system

The heart is the size of a ______ Fist
The heart is located in the ? Mediastinumn between the second rib and fifth intercostal space.
The heart is superior to the ? Surface of Diaphram
The hear is also ______ Two-thrids to the left the midsternal line
What is the heart enclosed in ? Pericardium, a double walled-sac
The superficial percardium does what in the heart ? Protects, nchors and prevents over-filling -It acts like a gridle
What are the two deep two-layered serous pericardium layers Parietal and Visceral
The parietal layer lines the what ? Internal surface of the fibrous pericardium
The visceral layer a.k.a epicardium lie on the ? External surface of the heart
The visceral layer is also filled with _______ _______ ( decreases friction). Pericardial Cavity
What is the outermost layer of the cardiac membrane and acts as a gridle ? Fibrous Pericardium
What is the Inner layer folded over on itself known as and froms the outer parietal layer and inner visceral a.k.a epricardium layer ? Serous Pericardium
The space between the fibrous pericardium and serous pericardium is known as _________ Pericardial Cavity
What are the three layers of the heart 1.Epicardium 2.Myocardium 3.Endocardium
The visceral layer of the serous pericardium is known as the _______ ? Epicardium
The contracting muscular part which has spiral bundles of cardiac muscle cells -Fibrous skeleton of heart crisscrossing; layers of connective tissue -Anchors cardiac muscle fibers -Supports great vessels and valves -Limits spread of action potential Myocardium
The internal lining, which is continous with the endothelial lining of all blood vessels. Endocardium
The the four chambers of the heart includes Two Atrias and Two Ventricles
The two atrias are seperated internally by the interatrial septum
What encircles the junction between the atria and ventricles ? Coronary Sulcus
What increases atrial volume ? Auricles
The two ventricles is separated by the Interventricular septum
The Atria is the Receieving chamber
The Atria walls are riged by Pectinate muscles
Vessels entering the right atrium are 1.Superior Vena Cava 2.Inferior Vena Cava 3.Coronary Sinus
Vessels entering the left atrium are Right and left pulmonary veins
The discharging chambers are called Ventricles
The ventricle walls are riged by trabeculae carneae
What projects into the ventricular cavities ? Papillary muscles
What are the vessels leaving the right ventricle called ? Pulmonary trunk
What are the vessels leaving the left ventricle called ? Aorta
The pathway of blood to heart explains : the heart is two side-by-side pumps
The right side of the heart is pump for the Pulmonary circuit
The vessels on the right side of the heart carries blood to and from the lung
The left side of the heart is the pump for the systemic circuit
The vessels on the left side of the heart carries blood to and from all body tissues
Blood flows from the heart from the Right atrium to the tricuspid valve and to the Right ventricle
Blood pumps from the heart from the Right Ventricle to pulmonary valve to the pulmonary arteries and ? Lungs
Blood flows from lungs to ________ _______ to left antrium Pulmonary veins
Blood flows from Left atrium to _______ _______ to left ventricle Mitral Valve
Blood flows from left ventricle to _______ ______ to aorta aortic valve
Aorta flows to the systemic circulation
The pulmonary circuit is a short,low pressure circulation
The systemic circuit is ? long,high pressure
The functional blood supply to the heart muscle is called the Coronary circulation
Arteries in the heart Right and left coronary (in atrioventricular groove)
Veins are in the heart Small cardiac, anterior cardiac, and great cardiac veins
Thoracic pain caused by a fleeting deficiency in blood delivery to the myocardium Agina pectoris
Prolonged coronary blockage Areas of cell death are repaired with noncontractile scar tissue Myocardial infarction (heart attack)
Heart valves ensures what ? unidirectional blood flow through the heart
What Prevents the back flow of blood into the atria when ventricles contract Tricuspid valve (right) Mitral valve (left Atrioventricular Valve
What Prevents the back flow of blood into the ventricles when ventricles relax Semilunar Valves
Blood leaving the left ventricle Aortic valve
Blood leaving the right ventricle Pulmonary valve
Cardiac muscle cells are striated, short, fat, branched, and interconnected
Connective tissue matrix (endomysium) connects to the fibrous skeleton
junctions between cells anchor cardiac cells are called intercarlated disk
What prevents cells from separating during contraction Desmosomes
What do Gap junctions allow ions to pass; electrically couple adjacent cells
Created by: jennysevere24



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