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NUMBER OF CAPILLARIES. In humans, blood flows from the heart into the aorta, from which it passes into the major arteries. These branch into small arteries (arterioles), which in turn branch into myriad capillaries (see the accompanying Figure). The blood returns to the heart via the veins. The radius of the aorta is about 1.2 cm, and the blood passing through it has a speed of about 40 cm/s. À typical capillary has a radius of 4x10-4 cm, and the blood flows through it at the speed of about 5 x 104 m/s. Estimate the number of

NUMBER OF CAPILLARIES. In humans, blood flows from the heart into the aorta, from which it passes into the major arteries. These branch into small arteries (arterioles), which in turn branch into myriad capillaries (see the accompanying Figure). The blood returns to the heart via the veins. The radius of the aorta is about 1.2 cm, and the blood passing through it has a speed of about 40 cm/s. À typical capillary has a radius of 4x10-4 cm, and the blood flows through it at the speed of about 5 x 104 m/s. Estimate the number of

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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NUMBER OF CAPILLARIES. In humans, blood flows from the heart into the aorta, from which it passes into the major arteries. These branch into small arteries (arterioles), which in turn branch into myriad capillaries (see the accompanying Figure). The blood returns to the heart via the veins. The radius of the aorta is about 1.2 cm, and the blood passing through it has a speed of about 40 cm/s. À typical capillary has a radius of 4x104 cm, and the blood flows through it at the speed of about 5 x 104 m/s. Estimate the number of capillaries that are in the human body. Head Arms Lungs Aorta Heart Body organs Trunk Kidneys Legs V = valves c = capillaries Arteries Veins
Transcribed Image Text:NUMBER OF CAPILLARIES. In humans, blood flows from the heart into the aorta, from which it passes into the major arteries. These branch into small arteries (arterioles), which in turn branch into myriad capillaries (see the accompanying Figure). The blood returns to the heart via the veins. The radius of the aorta is about 1.2 cm, and the blood passing through it has a speed of about 40 cm/s. À typical capillary has a radius of 4x104 cm, and the blood flows through it at the speed of about 5 x 104 m/s. Estimate the number of capillaries that are in the human body. Head Arms Lungs Aorta Heart Body organs Trunk Kidneys Legs V = valves c = capillaries Arteries Veins
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