The Heart Flashcards
where is the heart located?
enclosed within the inferior mediastinum, the medial section of the thoracic cavity
directed toward the left hip and rests on the diaphragm
apex
its broad posterosuperior aspect points toward the right shoulder and lies beneath the second rib
base
enclosed the heart, made up of three layers
Pericardium:
1 Fibrous Pericardium
2 Serous Pericardium
2.1 Parietal Pericardium
2.2 Visceral Pericardium/Epicardium
outermost layer of the heart
Epicardium
consist of thick bundles of cardiac muscle twisted and whorled into ringlike arrangements
layer that actually contracts
myocardium
thin, glistening sheet of endothelium that lines the heart chambers
endocardium
primary receiving chambers
superior atria
discharging chambers or actual pumps of the heart
ventricles
divides the atria
interatrial septum
divides the ventricles
interventricular septum
from the right ventricle to the lungs back to the left atrium
pulmonary circulation
from the left ventricle through the body tissues and back to the right atrium
systemic circulation
located between the atria and ventricles on each side, prevent backflow
atrioventricular valves
left AV valve
bicuspid valve/ mitral valve
right AV valve
tricuspid valve
tiny white cords, tendinous cords
chordae tendineae
guarda the bases of two large arteries leaving the ventricular chambers
semilunar valves
- pulmonary
- aortic
enlarged vessel on the posterior of the heart
coronary sinus
how many gallons of blood does the heart pumps?
1500 gallons
built into the heart tissue and sets the basic rhythm
intrinsic conduction system/ nodal system
crescent shaped node of tissue, located in the right atrium
sinoatrial node
at the junction of the atria and ventricles
atrioventricular node
spread within the myocardium of the ventricle walls
Purkinje fibers
