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The diameter is the length across the middle of a circle. Half of the diameter is called the radius.
inside
The Radius of a circle is half the Diameter of the circle.
Diameter
Arteries have the largest diameter, then arterioles, and last, capillaries.
Resistance changes dramatically with changes in diameter of blood vessels (arterioles are one type of blood vessel). If you INCREASE the diameter of the arteriole, you DECREASE the resistance and thus DECREASE the blood pressure.
Hypertrophy
Arterioles are small diameter vessels that branch off of your arteries. They inevitably connect arteries to capillaries. You can find them pretty much anywhere in your body
arterioles
It is basically a blood vessel (vein) except it is much smaller in diameter.
the small arteries are called arterioles
They are called arterioles.
the diameter increases as the height is increased
Arterioles are the smallest vessels of the arterial system, with a diameter of about 1/3 millimeter or smaller. There is much smooth muscle in their tunica media, which causes vasocontrictionwhen it contracts, and vasodilation when it relaxes. Such vasoconstriction and vasodilation plays two important roles in the cardiovascular system.controls of distribution of blood flow to different parts of the bodydetermines the total peripheral resistance
arterioles
Arterioles generally have the highest resistance because they are so extremely small.