45 terms

Blood Vessels and Blood Pressure

Know the diagrams with the arteries and veins. Know the parts of the aorta, coverings of the vessels, and the difference in vessels. Also know just in general what blood pressure is. We will review well before the quiz in case you have questions.
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Terms in this set (...)

Vessels transport blood...
to the tissues and back to the heart
Vessels that carry blood away from the heart
arteries and arterioles
Vessels that play a role in exchanges between tissues and blood
capillary bed
Vessels that return blood toward the heart
venules and veins
Tunica intima
forms a friction-reducing lining; endothelium which lines lumen
Tunica media
smooth muscle; controlled by sympathetic nervous system
Tunica externa
outermost layer of a blood vessel; mostly fibrous connective tissue; supports and protects the vessel
Parts of the aorta
ascending aorta, aortic arch, thoracic aorta abdominal aorta
subclavian arteries (right and left)
Do arteries or veins have a stronger and stretchier tunica media?
Arteries because that have to withstand changes in pressure
Why do veins have valves?
prevent back flow of blood
Microcirculation
blood flow through a capillary bed
true capillaries
actual vessels involved in exchange
Varicose veins
the pooling of blood in the feet and legs and inefficient venous return resulting from inactivity or pressure on the veins, the overworked valves give way
thrombophlebitis
inflammation of a vein associated with a clot formation
right coronary artery
branches of aortic arch
brachiocephalic trunk, left common carotid artery, left subclavian artery
axillary artery
brachial artery
radial artery
common iliac artery
femoral artery
ascending aorta
brachiocephalic veins
median cubital vein
superior vena cava
great saphenous vein
Venules
smallest veins; take blood back to heart
capillaries
Smallest diameter vessels.
Capillary walls are one cell thick
What is the largest artery in the body?
aorta - important role in stretching
blood pressure
the pressure that is exerted by the blood against the walls of blood vessels; the force that causes blood to continue to flow in the blood vessels
systolic
pressure in the arteries at the peek of ventricular contraction
Diastole
pressure when ventricles relax
How is BP expressed?
systolic/diastolic (120/80 mm Hg)
Systolic pressure ranges...
110 - 140
Diastolic pressure ranges...
70 - 80
hypotension
low blood pressure; low systolic; often associated with illness
Hypertension
high blood pressure; arterial pressure of 140-90 mm Hg
Substances move to and from the blood and tissue cells through _____
capillary walls
The substances that exchange during capillary exchange of gases and nutrients diffuse....
through interstitial fluid between cells
What routes do substances take when entering or leaving the blood?
diffusion through membranes; diffusion through intercellular clefts; diffusion through pores of fenestrated capillaries; transport via vesicles
BP forces fluid and solutes out of _____
capillaries
osmotic pressure
draws fluid into capillaries
Blood pressure is higher than osmotic pressure
at the arterial end of the capillary bed
Blood pressure is lower than osmotic pressure
at the venous end of the capillary bed