Internal Anatomy And Organisation Of The Heart Flashcards
What is the composition of the right Atrium?
Superior vena cava
Inferior vena cava
Coronary sulcus
What is the function of the coronary sulcus?
It opens into right Atrium
And coronary veins take blood back to the coronary sinus
What is the anatomy of the right ventricle?
Attaches to the chords tendinae from the pillars muscles of ventricle
What is the anatomy of the right ventricle?
Attaches to the chords tendinae from the pillars muscles of ventricle
What is the purpose of the right ventricle?
Prevents valve from opening backwards
What is the purpose of the atrioventenricular valve?
Prevents backflow
It’s an opening from right Atrium to right ventricle and also called the tricuspid valve
What is the purpose of the left Atrium?
Pulmonary veins delivery blood to the Atrium so Atrium recieves blood from Pulmonary veins and it passes it to the left ventricle the the left AV
How is the left ventricle diffrent from the right ventricle?
The left is larger and muscle is thicker and more powerful and it does not have a moderator band
How does the systematic circulation work?
Blood will leave the left ventricle through the aortic valve into the ascending arch and the ascending arch becomes the descending aorta
What is the structural difference between the left and right ventricle?
Right had a thinner wall and has less pressure than the left and it’s more pouch shaped
What is the semilunar valve?
It prevents backflow from the Pulmonary trunk and aorta into ventricles
What is the purpose of the cordae tendinae?
Prevents Av valves from bulging into atria during ventricular contraction
What is the anatomy of the papillary muscles?
They are located on the ventricles and are responsible for closing the semilunar valves and prevent blackflow into the ventricles
What is the correct flow of blood?
Tricuspid
Pulmonary
Bicuspid
Aortic
What are the semilunar valves?
They consist of the Pulmonary and aortic tricuspid valves
What is the purpose of the semilunar valves?
They prevent backflow from the Pulmonary trunk and aorta into the ventricles
What are the aortic sinuses?
They are found at the base of the aorta and they are sacs that prevent the cusps from sticking to the aorta and are the origin of right and left coronary arteries
What is the anatomy of the Cardiac skeleton?
It supports cardiac muscle fibers
And distribute forces of contraction and add strength and prevent the heart to over expand and allow the elastic fibers to return heart to its normal shape after contraction
What is the Cardiac fibrous Skeleton made of?
4 bands around the around the heart valves and bases of Pulmonary trunk
What is the purpose of the Cardiac (fibrous) Skeleton?
Stabalize valves
And electrically insulate ventricular cells from atrial cells
What is the coronary circulation?
The blood supply to the heart
What is the coronary circulation made up of?
Coronary arteries and cardiac veins
What are the coronary arteries?
The right and left arteries
And they originate at aortic sinuses
What is the anatomy of the right coronary artery?
It supplies blood to right Atrium and portions of both ventricles and also the SA and AV node and posterior interventricular artery and the marginal arteries
Where does the left coronary artery supply blood to?
The left ventricle
Left Atrium
And interventricular septum
What are the 2 branches of the left coronary artery?
Circumflex artery
Anterior interventricular artery
What is the function of the arterial anastomoses?
Interconnecting the anterior and posterior interventricular arteries and stabilize blood supply to cardiac muscle
What are the Cardiac Veins made up of?
Great cardiac vein
Anterior cardiac veins
Posterior cardiac vein,middle cardiac vein and small cardiac vein
What is the purpose of the great cardiac vein?
It drains blood from area of anterior interventricular artery into coronary sinusc
What is the purpose of the anterior cardiac veins?
It empties into right Atrium
What is the purpose of the other cardiac veins?
They empty blood into the great cardiac vein or coronary sinus
