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Chpt 18A
Cardiovascular system
| 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 |
Created by:
jennysevere24
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