Question | Answer |
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 |