Create an account
Pericardium- fibrous pericardium
tough, inelastic, dense irregular connective tissue
prevents overstretching, protection, anchorage
thinner, more delicate membrane-double layer (parietal layer fusted to fibrous pericardium, visceral layer also called epicardium)
outer (external) layer
visceral layer of serous pericardium
smooth, slippery texture to outermost surface
inner layer-smooth lining for chambers of heart, valves and continuous with lining of large blood vessels
contain coronary blood vessels
anterior interventricular sulcus
posterior interventricular sulcus
sulcus surrounds the chambers
tricuspid (between right atrium and ventricle) and bicuspid (between left artrium and ventricle)
pumps (deoxygentated) blood to lungs
shorter distance, lower pressure, less resistance
pumps (oxygenated) blood to body
longer distance, higher pressure, more resistance
works harder to maintain same rate of blood flow as right ventricle
aortic and pulmonary valves
opens when pressure in ventricle exceeds pressure in arteries
as ventricles relax, some backflow permitted, blood fills valve cusps closing them tightly
left side of heart...receives blood from lungs.. ejects blood into aorta..systemic arteries, arterioles..gas and nutrient exchange in systemic capillaries..sytemic venules and veins lead back to right atrium
right side of heart...receives blood from systemic circulation...ejects blood into pulmonary trunk then pulmonary arteries...gas exchange in pulmonary capillaries...pulmonary veins takes blood to left atrium
myocardium...own network of blood vessels, coronary ateries branch from ascending aorta-anastomoses provide alternate routes
allows heart muscle to receive sufficient oxygen even if artery is partially blocked
coronary capillaries, coronary veins-collect in coronary sinus and empires into right atrium
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together