Great Vessels

20 terms by beairdc1 

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Embryonic Truncus Arteriosus

orgin of both the aorta and pulmonary artery

Arteries have how many layers

3

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

Arterioles

As arteries branch out they become smaller

Two layer walls Tunica media and Intima

Arterioles

Capillaries

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

Capillaries

WindKessel

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

Aorta

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

AD

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