irculating 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

irculating 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

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter16: The Body's System

Section: Chapter Questions

Problem 4ACQ: Figure 16.10 Which of the following statements about the circulatory system is false? a. Blood in...

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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.
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
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.
True or false Blood pressure is a product of cardiac output and resistance. Blood pressure is lowest in the vena cava The pulse is felt at the large veins Arterioles are the most important vessels in regulation blood pressure. Veins and lymph vessels have valves Only arteries have smooth muscles Veins always carry deoxygenated blood.
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 statement below best explains why valves are necessary in the veins but not in the arteries? Venous valves prevent the backflow of blood into the ventricles. Blood flows in both directions through the arteries, but in the veins blood must flow in only one direction. Valves are found in arteries, not in veins. Blood in the arteries is moved forward by the pumping of the heart, but the veins feel very little of this forward push.
A key role of the atrioventricular node is to act as a barrier to prevent the electrical impulse in the atria from reaching the ventricles. slow down the conduction of the electrical impulse as it passes from the atria to the ventricles. act as the pacemaker of the heart, by generating electrical signals in the right atrium. speed up the conduction of the electrical impulse as it passes from the atria to the ventricles. block backflow of blood from the aorta into the right ventricle.
How might you connect "arteries," "capillaries," "veins," and "interstitial fluid" to the concept map? Select all correct statements. Check All That Apply Blood vessels include arteries, capillaries, and veins. Blood vessels include arteries, capillaries, and veins. Arteries have more smooth muscle than veins. Arteries have more smooth muscle than veins. Veins have slower blood velocity than capillaries. Veins have slower blood velocity than capillaries. Capillaries exchange dissolved substances with interstitial fluids. Capillaries exchange dissolved substances with interstitial fluids. The heart pumps interstitial fluids.
Which one of the following statements is incorrect? There are no valves in arteries. the walls of veins are thin. the walls of capillaries are thick. veins carry blood into the heart.
The circulatory system has 5 functions. · Highlight the statements below that are only functions of the circulatory system. It carries cells that help to fight diseases. It gives structure and support to the body. It carries waste products to the urinary system. It carries carbon dioxide from cells to the lungs. It maintains body posture. It carries nutrients from the digestive system to other cells. It carries oxygen from the lungs to other cells. · The list gives some structures in the blood and circulatory system. Heart, artery, red blood cell, ventricle, capillary, plasma, vein, white blood cell, platelets (a) Which of these structures (i) Can destroy bacteria?................................................................................. (ii) Carries carbon dioxide. .................................................................................. (iii) Pumps blood around the…
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
The circulatory system has 5 functions. · Highlight the statements below that are only functions of the circulatory system. It carries cells that help to fight diseases. It gives structure and support to the body. It carries waste products to the urinary system. It carries carbon dioxide from cells to the lungs. It maintains body posture. It carries nutrients from the digestive system to other cells. It carries oxygen from the lungs to other cells.