Lecture 1: Heart Intro Flashcards
Systemic circuit
Blood to all organs (also different parts of lungs and heart wall)
Pulmonary Circut Route
Gets blood that ciruclated through body and gave up Oxygen
Blood comes in with CO2into pulmonary trunk–> R&L pulmonary arteries blood to air sacs and lungs
in lungs give up CO2 and get oxygen
Pulmonary veins to left heart
Systemic Circuit Route
Left vent to Aorta
blood leaves Aorta Aortic arch–> head neck, upper limbs
all body once deoxygenated, goes to right heart by superior and inferior vena cava (veins)
Aorta
Largest artery in the body
left ventricle
source of force
blood from here goes to aorta then rest of body
More muscles
ends blood out via aorta
venous blood
deoxygenated blood
Systemic Veins and arteries
Veins carry venous
Arteries carry atrial
Pulmonary Veins and arteries
Veins carry atrialArteries carry venous
6 major systems for blood
brain skin heart kidneys muscles GI system
Right Ventricle
sends blood to pulmonary circulation
Sends blood out via pulmonary trunk
Left atrium
blood leaving pulmonary circut (aterial) goes here
Right side
3 vessels, tricuspid valve
Left Side
4 pulmonary veins, bicuspid valve
Cardiac Output
amount of blood pumped/unit time
L/min
Equal for both sides
Resting CO
5 L/min (almost all of the blood)
Maximum CO
30 L/min
The atria
recieve the blood first
Semilunar Valves
between LV and aorta and RV and pulmonary trunk
Atrioventricular Valves
between atria and ventricles no backflow flaps with chrodae tendinae Prevent prolapse (leakage back into atria) attach to heart walls papillary muscles anchor cusps
Left AV valve
bicuspid/mitral
seperate left atrium and left vent
Right AV valve
tricuspid
separate right atrium and ventricle
Semilunar Valves
valves open/close in response to pressure diffs
aortic pressure is highest of arteries
pressure in ventricle must be greater for aortic valve to open
Right Semilunar Valve
Pulmonary semilunar valve
separate right ventricle from main pulmonary trunk
Left Semilunar
Aortic Semilunar
Separate left ventricle from aorta
Coronary Circulation
blood supply to heart
Collateral Routes for CC
anastomoses
make sure heart get bloods even if major vessles are blocked
multiple routes/branching
Supply for heart tissue comes from
Right and Left Coronary arteries
both originate on ascending aorta
Waste from CC is picked up…
from capillary vessels. It is then sent out through veins
Right Coronary Artery
supplies SA node, AV node, right atrium, interventricular septum, right and left ventricles
Marginal Branch
Posterior Interventricular branch
Left Coronary Artery
supplies SA node, part of left artery, interventrical septum, ventricles
circumflex branch
anterior
interventricular branch
Marginal Branch
right coronary artery
supplies anterior parts of right ventricle
Posterior Interventricular branch
Right Coronary artery supplies posterior parts of both ventricles
circumflex branch
left coronary artery supplies left atrium and posterior left ventricle
anterior interventricular branch
left coronary artery
supplies anterior parts of both ventricles
Great Cardiac Venin
Coronary Circulation
drains anterior heart
Middle Cardiac Vein
Coronary Circulation
drains posterior heart
Coronary Sinus
Coronary Circulation
very large
drains middle cardiac and great cardiac veins
drains INTO right atrium
Pulmonary circuit
Blood to lungs, gas exchange, back to heart
arteries
carry blood away from heart
Veins
carry blood to heart
capillaries
exchange waste, nutrients, and gasses with intestinal fluids?
