Valvular ring in the heart
ATRIUMS & VENTRICLES
The chambers of the heart (upper & lower)
This chamber of the heart receives deoxygenated blood from the body (from the superior and inferior vena cava's.
This chamber of the heart receives oxygenated blood from the lungs (from the 4 pulmonary veins)
BUNDLE OF HIS
This is a continuation of the AV node & located at the interventricular septum. It branches out. The branches terminate into the Purkinje fibers.
These are the main site of gas exchange and nutrient exchange
These supply the capillaries of the myocardium with blood
Tough fibrous bands of connective tissue that attach the cuspid valves to the walls of the ventricles of the heart.
This is the innermost layer of the heart and lines the inner chambers & heart valves
This is the outermost layer of the heart
Arteries, arterioles, capillaries, venules & veins these are what?
ENDOCARDIUM, MYOCARDIUM, EPICARDIUM
The three layers of the heart tissue
VISCERAL & PARIETAL
The two layers of the Epicardium
This is the tough fibrous outer membrane (of the pericardial sac) that attaches to the sternum & thoracic vertebrae & diaphragm
This is the thin, inner layer of the pericardial sac that closely adheres to the heart.
this is the middle layer and actual contracting muscle of the heart
The layer of the Epicardium that forms the inner layer of the double walled sack (pericardium) that surrounds the heart.
Slinglike serous membrane that partially encloses the heart; supports the weight of the heart.
This encases and protects the heart from trauma & infection. Has two layers (parietal & visceral). Holds 5-30 mL of pericardial fluid, lubricates the pericardial surfaces & cushions the heart.
These fibers (formed from the bundle of HIS), are a network of conducting strands, that spread wave of depolarization thru the ventricles. Can act as pacemaker with rate at 20-40 BPM when higher pacemakers fail.
Sinatrial node, located at junction of superior vena cava & R atrium, pacemaker of the heart.
Pacemaker of the heart
this is located in the lower aspect of the atrial septum, and causes a pause in the heart beat. Allows ventrile to fill
The triscuspid and the biscuspid (mitral) vales are what type of valves?
TRISCUSPID & BISCUSPID (MITRAL)
What are the two Atrioventricular valves?
The triscuspid valve is located on what side of the heart, between the atria & ventricle?
The biscuspid (mitral) valve is located on what side of the heart, between the atria & ventricle?
PULMONIC & AORTIC
what are the two semilunar valves called?
This semilunar valve lies between the R ventricle and the pulmonary artery
This semilunar valve lies between the L ventricle & and aorta
These valves prevent blood from flowing back into ventricles during relaxation. They open during ventricular contraction & close when the ventricles begin to relax.
This receives blood from the right atrium and pumps it to the lungs via the pulmonary artery
This is the largest & most muscular chamber; it receives oxygenated blood from the lungs via the left atrium & pumps blood into the systemic circulation via the aorta
The layer of the Epicardium that is attached to the myocardium
RIGHT AND LEFT PULMONARY ARTERIES
these arteries carry blood to pulmonary circulation before coming back to left atrium
last largest artery before blood goes into the systemic circulation
RIGHT CORONARY ARTERY
This supplies the right atrium and ventricle, the inferior portion of the left ventricle, the posterior septal wall and the sinoatrial Atrioventricular nodes.
Left Anterior Descending (LAD)
This supplies blood to the anterior wall of the left ventricle, the anterior ventricular septum & the apex of the left ventricle.
These are vessels thru which blood passes away from the heart. They carry oxygenated blood from the left side of the heart.
These allow the exchange of fluid & nutrients between the blood and the interstitial spaces.
These transport deoxygenated blood from tissues back to right heart and then lungs for oxygenation.
This coronary artery supplies blood to the left atrium & left ventricle
What is the only artery in the body that carries unoxegenated blood?