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Blood vessel structure and function
Terms in this set (44)
What do the blood vessels of the body form?
a closed delivery system that begins and ends at the heart
What is the inner most layer of a blood vessel?
tunica intima (endothelium)
What is the middle layer of a blood vessel?
tunica media (smooth muscle and elastin)
What is the outermost layer of a blood vessel?
tunica externa (collagen fibers)
What is the blood containing space of a blood vessel?
What layer of a blood vessel forms a smooth, friction-reducing lining?
What layer of blood vessel binds blood vessels to surrounding structures?
tunica externa /adventitia
What layer of blood vessel is made up of circularly arranged smooth muscle?
What layer of blood vessel is responsible for changing the diameter of the vessel?
What layer of a blood vessel is made up mostly of collagen?
Type of blood vessel that transports blood away from the heart
Type of blood vessel that transports blood toward the heart
Type of blood vessel involved in the exchange of material between the blood and the cells
Smallest blood vessel type
Blood vessel type with the thickest tunica media
Blood vessel type with the thin walls and a thick tunica adventitia
Blood vessel type with the highest pressure
Blood vessel type with valves
Blood vessel type made up of the tunica intima
What are the elastic arteries of the body?
aorta and branches
What type of artery is closest to the heart?
What type of artery experiences the greatest pressure as the heart forces blood into the arteries?
What type of artery propels blood onward as they recoil when the heart relaxes?
What blood vessel type experiences the widest variation in pressure?
What blood vessel type delivers blood to specific body organs?
What blood vessel type is capable of actively constricting and relaxing?
Small changes in the diameter of what blood vessel type greatly influences blood flow and blood pressure?
In what type of blood vessel does blood pressure begin to decline?
What are the smallest arteries called?
What is a small arteriole that brings blood to a capillary bed called?
(terminal) feeder arteries
What type of blood vessel experiences the steepest drop in blood pressure?
In what type od blood vessel is there the greatest resistance to blood flow?
In what type of blood vessel does the pulsing of blood cease?
What type of blood vessel is arranged in beds?
What type of blood vessel is formed when capillaries unite?
What type of blood vessel is formed when venules unite?
What type of blood vessel has thinner walls and larger lumen diameters than arteries?
What special adaptations are required in veins to help return blood to the heart?
Where are venous valves most abundant?
What do venous valves oppose?
What do one-way valves prevent?
backflow as blood travels toward the heart
What do contracting skeletal muscles do?
press against veins
What happens to pressure in the abdominal cavity during inhalation?
As pressure in the abdominal cavity increases, what happens to abdominal veins?
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