Which is the higest in Pressure Velocity Diameter Aorta, arteries, capillaries,
ID: 3512462 • Letter: W
Question
Which is the higest in Pressure Velocity Diameter Aorta, arteries, capillaries, venules, veins or vena cava? Q: Categories each blood vessel according to blood pressure and velocity and diameter Which is the higest in Pressure Velocity Diameter Aorta, arteries, capillaries, venules, veins or vena cava? Q: Categories each blood vessel according to blood pressure and velocity and diameter Pressure Velocity Diameter Aorta, arteries, capillaries, venules, veins or vena cava? Q: Categories each blood vessel according to blood pressure and velocity and diameterExplanation / Answer
Answer:
Pressure:
Highest pressure is recorded in the aorta. It is about 90-100mmHg. Blood enters the aorta directly after the left ventricular contraction and the blood pressure dampens as it flows away from the heart and almost drops to zero in the inferior vena cava as it is returned back to the heart.
Velocity:
Aorta has the highest velocity of blood flow. The velocity of blood flow is determined by the Total cross-sectional area of the vessel; means the entire cross-sectional areas of a particular group or kind of vessel. Capillaries have the maximum total cross-sectional area of 4500 sq cm and the aorta has the least of about 4.5 sq cm.
The velocity is inversely related to the diameter of the blood vessel hence velocity is seen maximum for aorta and minimum for capillaries.
Diameter:
Highest diameter is in the vena cava of 3-3.5 cm followed by the aorta of 2.5 cm and the least diameter is seen in capillaries being 0.0004-0.0008 cm.
VESSEL PRESSURE(mmHg) VELOCITY(cm/s) DIAMETER(cm) Aorta 90 - 100 20 - 140 2.5 Arteries 80 - 100 40 - 60 0.2 - 2.4 Capillaries 25 - 30 0.02 - 0.17 0.0004 - 0.0008 Venules 20 0 - 1 0.1 Veins 10 - 20 5 0.6 - 1.5 Vena cava 2 - 10 15 - 40 3- 3.5Related Questions
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