Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

Embryonic Truncus Arteriosus

orgin of both the aorta and pulmonary artery

Arteries have how many layers


Tunica Intima

inner layer single cell thickness of endothelial cells

Tunica Media

middle layer of arteries, thicker muscle layer

Tunica Adventitia

Outer layer of the arteries, white fibrous layer


As arteries branch out they become smaller

Two layer walls Tunica media and Intima



Branch out even smaller than arterioles, have the ability to expand and contract based on blood supply needed in the area.

Has only intima as there walls



Aorta ability to act as a compression chamber or reservoir for blood due to distensibility and compliance when rapid ejection form the lv occurs, it effects diminish with aging


Carries oxygenated blood away from the heaart during lv systole

6 divisions of the aorta

Sinuses of Valsalva, AS, transverse AA, AD, thoracic and abdominal aorta

___ ____ becomes the abdominal aorta after it penetrates the diaphragm

Thoracic Aorta

Aortic Arch has three main branches

Brachiocephalic artery, Left common carotid and left subclavian artery

Pulmonary Artery

returns deoxygenated blood to the lungs, it begins at the pulmonic valve level where bifurcates into the r and l pulmonary arteries a few cm from its orgin

Pulmonary Pressure

thinner walls in adults with pressure approximatly one sixth of systemic circulation in the normal adult heart

Pulmonary capillary pressure at rest

7-10 mmhg

Systemic capillary pressures

25-358 mmhg

Larger than the normal Coronary sinus

Descending Aorta

Lies inferior to the LA and the region of the Atrioventriclar groove and lies outside the pericardial shadow


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!


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

Voice Recording