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Determine the erythrocyte sedimentation rate assuming that the erythrocytes have a spherical shape with a diameter of 8 microns. Take the blood density 1060 kg/m3, the density of the substance of erythrocytes 1090 kg/m3.
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- The human circulation system has approximately 1X109 capillary vessels. Each vessel hasa diameter of about 8μm. Assuming cardiac output is 5L/min, determine the averagevelocity of blood flow through each capillary vessel.If you are infusing a 1 L Iv bag of a normal saline at a rate of 100 ml per hour, how long will it take for the entire IV bag to infuse into the patient ?A person contains 7 L of blood. Blood is composed of 55 percent plasma and 45 percent blood cells by volume. The density of the blood plasma is approximately 1025 kg/m3 and the density of blood cells circulating in the blood is approximately 1125 kg/m3. Determine the mass of (a) plasma and (b) blood cells in seven liters of human blood.
- Take the density of blood to be ρ and the distance between the feet and the heart to be hH. Ignore the flow of blood. (a) Show that the difference in blood pressure between the feet and the heart is given by PF - PH = ρghH. (b) Take the density of blood to be 1.05 x 103 kg/m3 and the distance between the heart and the feet to be 1.20 m. Find the difference in blood pressure between these two points. This problem indicates that pumping blood from the extremities is very difficult for the heart. The veins in the legs have valves in them that open when blood is pumped toward the heart and close when blood flows away from the heart. Also, pumping action produced by physical activities such as walking and breathing assists the heart.Human blood flows from the aorta to the capillaries. A girl has an aorta radius of 13 mm. Assume she has 7 billion capillaries in the body, the capillaries radius average 4 um (micrometer), and the blood speed average 0.5 mm/s in the capillaries. The blood speed is mm/s in the aorta. Type your answer.Human blood flows from the aorta to the capillaries. A girl has an aorta radius of 13 mm. Assume She has 7 billion capillaries in the body, the capillaries radius average 4 micrometers, and the blood speed average 0.5 mm/s in the capillaries. The blood speed is ___ mm/s in the aorta.
- (a) As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). If the blood speed increases by a factor of 4.00 and the total cross-sectional area of the venules is 9.5 cm2, what is the total cross-sectional area of the capillaries feeding these venules? (b) How many capillaries are involved if their average diameter is20.0 μm?The approximate inside diameter of the aorta is 0.49 cm; that of a capillary is 12 μm. The approximate average blood flow speed is 1.0 m/s in the aorta and 1.0 cm/s in the capillaries. If all the blood in the aorta eventually flows through the capillaries, estimate the number of capillaries in the circulatory system. capillariesThe approximate inside diameter of the aorta is 0.49 cm; that of a capillary is 8 µm. The approximate average blood flow speed is 1.0 m/s in the aorta and 1.0 cm/s in the capillaries. If all the blood in the aorta eventually flows through the capillaries, estimate the number of capillaries in the circulatory system.capillaries
- (a) As blood passes through the capillary bed in an organ, the capillaries join to form venules (small veins). If the blood speed increases by a factor of 4.00 and the total cross- sectional area of the venules is 10.0 cm2 , what is the total cross-sectional area of the capillaries feeding these venules? (b) How many capillaries are involved if their average diameter is 10.0 µm ?The approximate diameter of the aorta is 0.50 cm; that of a capillary is 10 μm. The approximate average blood flow speed is 1.0 m/s in the aorta and 1.0 cm/s in the capillaries. If all the blood in the aorta eventually flows through the capillaries, estimate the number of capillaries in the circulatory system.estimate the average blood pressure in a persons foot if the foot is 1.33 m below the aorta, where the average blood pressure is 123 mmHg. The density of blood is 1060 kg/m.