Notes Quiz Flashcards
What does the Cardiovascular system consist of
Heart, arteries, veins, capillaries
Four chamber muscular organ
Heart
Comparable to the size of a closed fist
Heart
Where is the heart located
Mediastinum
- Behind Sternum
- Between 2nd and 6th ribs
- Between T5-T8
Base of the heart
Apex
-Located at the 5th intercostal space
Loose fitting sac surrounding the heart
Pericardium
Tough, loose-fitting, inelastic
Fibrous-Pericardium
Lines the inside of the fibrous pericardium
Parietal layer
Between parietal and visceral layer, filled with 10-15ml of pericardial fluid, decreases friction
Pericardial space
Adheres to the outside of the heart
Visceral layer
Outer layer
Epicardium
Serous pericardium
Epicardium
Thick, contractile layer composed of cardiac muscle cells
Intercalated disks contain many gap junctions, allow cardiac muscle cells to function as a single unit (syncytium)
Myocardium
Two superior chambers, receiving chambers, blood from veins enter here
Atria
Two inferior chambers, pumping chambers, thick muscular walls to increase force of pumping action, separated by inter ventricular septum
*Left>Right
Ventricles
Permits blood flow in one direction during circulation
Valves of the heart
Also cuspid valves,between atria and ventricles
Atrioventricular Valves (AV Valves)
Between R ventricle and pulmonary arteries and L ventricle and aorta
Semilunar (SL Valves)
-Atrioventricular Valves
Between R atrium and ventricle
3 flaps of endocardium
Connected to ventricular papillary muscle via chordae tendinae
Tricuspid Valve
-Atrioventricular Valve
Between L atrium and ventricle
Also called mitral valve
Two flaps of endocardium
Bicuspid valve
Between R ventricle and pulmonary trunk
Pulmonary semilunar valve
Between L ventricle and aorta
Aorta Semilunar Valve
Interior of cardiac wall
- endothelial tissue
- covers projections of myocardial tissue called trabeculae
Endocardium
Another name for cardiovascular system
Circulatory System
