Cardiovascular System

arteries (Heart to Body) have:

• thicker walls = narrow lumen

• oxygenated blood

• higher pressure

• a pulse

veins (Body to Heart) have:

• thinner walls = wider Lumen

• deoxygenated blood

• lower pressure

• no pulse

• has valves

capillaries (Where veins and arteries meet)

• Arterioles and Venules are branched from their respective trunks into capillaties

• exchanges materials between blood and tissue cells

• Single-layer (endothelium) = small blood vessels

pulmonary artery

only artery to carry deoxygenated blood

pulmonary vein

only vein to carry oxygenated blood

endothelium, tunica Intima

innermost layer blood vessel

tunica media

middle layer of blood vessel

tunica externa, tunica adventitia

outermost layer blood vessel

lumen

inner space where blood flows

valve

serves as a door and prevents backflow in veins

med terms for: Heart

Card(i)(o), Coronal

pericardium

“peri”- around, Fibrous and serous covering of the heart

epicardium

“epi” - outer, the outermost layer of the heart

myocardium

“myo” - muscle, the muscle layer responsible for pumping blood through the ventricles

endocardium

“endo” - inner, the innermost layer lining the heart

aorta

the largest artery in the body

inferior vena cava

the largest vein in the body