An organism’s circulatory system functions in transport, delivering nutrients to cell and removing waste. The structure and efficiency of circulatory systems varies in different organisms.note whether the statements below are consistent with an open or closed circulatory system. The circulating fluid flows in one direction (unidirectionally) through a circulatory loop. The circulating fluid is called hemolymph. Ostia are pores in the heart, important for circulatory function. The circulating fluid is called blood. The circulating fluid remains in vessels as it moves throughout the organism. Is the more efficient type of circulatory system.

An organism’s circulatory system functions in transport, delivering nutrients to cell and removing waste. The structure and efficiency of circulatory systems varies in different organisms.note whether the statements below are consistent with an open or closed circulatory system. The circulating fluid flows in one direction (unidirectionally) through a circulatory loop. The circulating fluid is called hemolymph. Ostia are pores in the heart, important for circulatory function. The circulating fluid is called blood. The circulating fluid remains in vessels as it moves throughout the organism. Is the more efficient type of circulatory system.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter10: The Blood Vessels And Blood Pressure

Section: Chapter Questions

Problem 9RE

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note whether the statements below are consistent with an open or closed circulatory system. The circulating fluid flows in one direction (unidirectionally) through a circulatory loop. The circulating fluid is called hemolymph. Ostia are pores in the heart, important for circulatory function. The circulating fluid is called blood. The circulating fluid remains in vessels as it moves throughout the organism. Is the more efficient type of circulatory system.
Blood is pushed out of the heart through a large vessel, called the aorta. The aorta then divides into smaller and smaller blood vessels, eventually reaching vessels called capillaries. Capillaries are so small that oxygen and nutrients can diffuse across the vessel walls and into the tissues of the body, with CO2 and waste diffusing back into the blood. Let's say that the cross-sectional area of the aorta is 1 cm2 = 100 mm2. The blood pumps through the aorta at 100 mm/s but only through the capillaries at 1 mm/s. If each capillary has a cross-sectional area of 20 mm2, how many capillaries must there be in the body? Note: these numbers are not physiologically correct, but were chosen to make the math easier. The blood velocity through the aorta is closer to 300 mm/s. The capillaries have a total cross-sectional area of ~600,000 mm2 (6000 cm2), with a blood flow rate closer to 0.2 mm/s.
The English physiologist William Harvey made all of the following circulatory discoveries except: both pulmonary and systemic blood pressure comes from pumping of the heart the function of valves in the veins is to direct blood flow back to the heart blood in the arteries is under more pressure than is blood in the veins arterial pressure is greatest during diastole and lowest during systole the function of the vertebrate heart is to pump blood continuously
Three circulatory systems of vertebrates are represented in the following diagram. Identify to which group of animals each circulatory system belongs and mention the reasons for considering them as such. ↑ Capilares de las branquias Aorta Capilares sanguíneos ↓ Capilares pulmonares Aorta Capilares sanguíneos ↓ Capilares pulmonares Aorta Capilares sanguineos
If you added "Pulmonary circulation" and "Systemic circulation" to the concept map, what new connecting phrases might you write? Select all that apply. Check All That Apply The circulatory system is divided into two loops called pulmonary circulation and systemic circulation. In pulmonary circulation, blood is pumped to the lungs and back to the heart. In systemic circulation, blood is pumped only to the lower body and back to the heart. The heart pumps oxygenated blood to the body tissues in pulmonary circulation
Which of the following is the correct sequence of blood flow through pulmonary circulation? Group of answer choices Right atrium → right ventricle → pulmonary arteries → pulmonary capillaries (in lungs) → pulmonary veins → left atrium Left atrium → left ventricle → pulmonary arteries → pulmonary capillaries (in lungs) → pulmonary veins → right atrium Right atrium → right ventricle → pulmonary capillaries (in lungs) → pulmonary arteries → pulmonary veins → left atrium Left atrium → left ventricle → pulmonary capillaries (in lungs) → pulmonary arteries → pulmonary veins → right atrium Left atrium → left ventricle → pulmonary veins → pulmonary arteries → pulmonary capillaries (in lungs) → right atrium
Vertebrates, such as humans, have a(n) pathway. pulmonary circulatory lungs The heart pumps blood to the tissues through the circuit. systemic terrestrial The heart pumps blood to the lungs through the circuit. gills one-circuit This type of circulatory pathway is seen in organisms that utilize to breathe air. two-circuit
What are some observations comparing the schematics of the fish and mammal circulatory systems? (Note: these are simplified schematics that don't show every single route for blood, so focus on the heart and the immediate inflow/outflow around the heart.)
An artificial heart works in closed loop by varying its pumping rate according to changes in signals from the recipient's nervous system. For feedback compensation design it is important to know the heart's open-loop transfer function. To identify this transfer function, an artificial heart is implanted in a calf while the main parts of the original heart are left in place. Then the atrial pumping rate in the original heart is measured while step input changes are effected on the artificial heart. It has been found that. in general, the obtained response closely resembles that of a second-order system. In one such experiment it was found that the step response has a %OS = 30% and a time of first peak 7, 127 sec (Nakamura, 2002). Find the corresponding transfer function. Aside from the corresponding transfer function, determine the following as well: delay time, rise time, settling time and steady state error if input is a step response. CO M
Which of the following statements about the circulatory system is INCORRECT? Question 25 options: With respect to diameter: Aorta > arteries > arterioles > capillaries Arterial walls are thicker than the walls of veins of the same size Arteries retain their round shape when empty, veins are thin and tend to collapse Veins always carry de-oxygenated blood away from capillary beds Blood pressure in veins is lower than in arteries of the same size
Describe the purpose (and advantages) of a double circulation (“2 pump” circulatory system)
The pressure in the aorta changes throughout the cardiac cycle. During systole, as the heart contracts, the outflux of blood into the aorta causes an increase in pressure, whereas during diastole the pressure decreases as the heart relaxes. A simple model for the aortic pressure waveform is given by the Windkessel effect described by the image below. In this model, the heart is considered a pressure generating pump which is directly connected to an elastic compartment (the aorta), which in turn is connected to a rigid set of peripheral vessels (the hose of the firefighter). 5 Pump Heart Air Windkessel Elastic arteries In order to find the aortic pressure waveform from the Windkessel model, a mass balance formulation around the aorta must be formulated. Coming into the aorta from the heart we have the flowrate Q(t). According to conservation of mass, this inflow rate Q(t) must be equal to the outflow rate into the peripheral vessels and the change in volume of the aorta. To find these…