Vessels and Circulation Flashcards
(40 cards)
What do vessels often share their name with?
The body region or bone next to it.
What is systemic circulation?
Circulation of blood vessels that extend to and from the body tissues.
What is pulmonary circulation?
Circulation of vessels that take blood to the lungs for gas exchange and then return it to the heart.
Where do arteries transport blood?
away from the heart to body tissues.
What do arteries bifurcate into?
arterioles and capillaries
What to capillaries eventually become?
venules and veins
What is an anastomosis?
Site where two or more vessels merge to supply the same body region.
What happens to veins as they get closer to the heart?
They increase in size
What are anatomical end arteries?
vessels whose terminal branches do not anastomose. They can cause oxygen deprivation of tissues if blocked.
What are functional end arteries?
arteries whose anastomoses are so small that they may be considered end arteries.
What are the tunics of vessels?
The walls of blood vessels.
What is the tunica intima composed of?
epithelial cells
What is the tunica media composed of?
smooth muscle cells (under autonomic control)
What is the tunica externa composed of?
collagen cells
Does an artery or a vein have a larger tunica media?
artery
Does an artery or a vein have a larger tunica externa?
vein
What is a “substitute” for the tunica media in the veins?
valves
Does an artery or vein maintain a circular shape?
artery
Which vessel has the highest blood pressure?
artery
What carries deoxygenated blood to the lungs?
pulmonar arteries
What are the three types of arteries?
elastic, muscular, arterioles
As an artery’s diameter decreases, what increases?
smooth muscle
What is a feature of elastic arteries?
they have a high proportion of elastic fibers in the tunica media; allows for SMOOTH flow of blood.
Where can elastic arteries be found?
aorta, pulmonary arteries, brachiocephalic trunk, common carotid and iliac
