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The blood pressure through the systém iš highest at the ou as it moves through the system approximately (for a person lying down) as shown in the figure. The drop is largest in the capillaries. Why? Because the viscosity of blood is lower when it's in the capillaries. Because the total cross-sectional area of the capillaries is large. Because each capillary has a small radius. Because the velocity of flow in the capillaries is very low.

The blood pressure through the systém iš highest at the ou as it moves through the system approximately (for a person lying down) as shown in the figure. The drop is largest in the capillaries. Why? Because the viscosity of blood is lower when it's in the capillaries. Because the total cross-sectional area of the capillaries is large. Because each capillary has a small radius. Because the velocity of flow in the capillaries is very low.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Blood flows out of your heart through the aorta, then the capillaries, then to the vena cava vessel before returning to the heart. Although each individual capillary has a small cross-sectional area, there are many of them so that all the capillaries together have a large total cross sectional area. The total cross-sectional area is listed in the figure. capillaries -900 cm2 aorta vena cava -3 cm2 -18 cm2 125 15- 100 75- 10 50아 5- 25- Pressure (mm-Hg) Pressure (kP)
Transcribed Image Text:Blood flows out of your heart through the aorta, then the capillaries, then to the vena cava vessel before returning to the heart. Although each individual capillary has a small cross-sectional area, there are many of them so that all the capillaries together have a large total cross sectional area. The total cross-sectional area is listed in the figure. capillaries -900 cm2 aorta vena cava -3 cm2 -18 cm2 125 15- 100 75- 10 50아 5- 25- Pressure (mm-Hg) Pressure (kP)
Aorta Arteries Capillaries Veins Vena Cava The blood pressure through the system is highest at the output of the heart and falls as it moves through the system approximately (for a person lying down) as shown in the figure. The drop is largest in the capillaries. Why? Because the viscosity of blood is lower when it's in the capillaries. Because the total cross-sectional area of the capillaries is large. Because each capillary has a small radius. Because the velocity of flow in the capillaries is very low. Because the capillaries are very short.
Transcribed Image Text:Aorta Arteries Capillaries Veins Vena Cava The blood pressure through the system is highest at the output of the heart and falls as it moves through the system approximately (for a person lying down) as shown in the figure. The drop is largest in the capillaries. Why? Because the viscosity of blood is lower when it's in the capillaries. Because the total cross-sectional area of the capillaries is large. Because each capillary has a small radius. Because the velocity of flow in the capillaries is very low. Because the capillaries are very short.
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