Cardio anatomy Flashcards
What is the daily output of the heart
7000L/day
about 5 L/min, that can reach about 4x the amount during exercise
Without blood supply you will be
unconscious in 10 seconds and you will die in 4 minutes
What is the distribution of blood over the systems
9% of the blood reside in the pulmonary
7% reside in the 2pumps
84% reside in the systemic, and around 75% of the systemic circuit blood is found in veins
What is the function of an atrium and auricle
A reservoir upstream to the pump
During ventricular ejection, venous blood can accumulate and enter the ventricle quickly during the filling phase, the auricle is used to increase the capccity of the atrium
Peak pressures
Axes of blood flow
Larger retention of pressure than systemic circulation despite lower ventricular pressure, due to much lower resistance in pulmonary circuit, and Axial significance is that verticle axis is due to systemic, horizontal to pulmonary
What are the shapes of inlet valves, and what are they made up of
Flat flap,
Fibrous connective Tissue
What is the outlet valve made of, and its shape
small pocket shaped or semilunar,
Fibrous connective tissue
You will see coronary ostea near the cusps.
When inflatedthey gain strength from their 3D shape, and pressure of blood re-entering ventricles forces the free edges of the cusps together
How do the sizes of the diameters of inlet valves compare to outlet valves
Inlet valves are larger, to admit blood at low pressures
Small daimeters of outlet valves because blood leaves at high pressures, so there is no requirement
What would happen if the atria and the ventricles contracted at the same time
Atrioventricular valves would shut, blood being squeezed in the atria would backflow into the veins,
the 100 ms delay Allows for atrial contraction just before ventricular contraction, and gives time to top up to blood to increase ejection efficiency
Right coronary artery:
supplies the anterior right side of the heart, loops around and supplies most of the posterior side of the heart
Left coronary
basically just the left ventricle
Blood flow in coronary arteries
systole, heart squeeze, so no blood through
During diastole, the blood flows through coronary arteries
