The Greek anatomist Erasistratus, originally from Ceos, identified the correct function of the right atrioventricular valve of the human heart, which was to prevent backward flow of blood from: the right ventricle to the right atrium the right ventricle to the left ventricle the right ventricle to the left atrium the left ventricle to the right ventricle
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The Greek anatomist Erasistratus, originally from Ceos, identified the correct function of the right atrioventricular valve of the human heart, which was to prevent backward flow of blood from:
- the right ventricle to the right atrium
- the right ventricle to the left ventricle
- the right ventricle to the left atrium
- the left ventricle to the right ventricle
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- The Greek anatomist Erasistratus, originally from Ceos, identified the correct function of the right atrioventricular valve of the human heart, which was to prevent backward flow of blood from: the right ventricle to the right atrium the right ventricle to the left ventricle the right ventricle to the left atrium the left ventricle to the right ventricle the left ventricle to the left atriumHerophilus from Chalcedon identified how many chambers in the human heart? 6 chambers: the right and left atria, the right and left ventricles, and the superior and inferior auricles 5 chambers: the right and left atria, the right and left ventricles, and the superior auricle 4 chambers: the right and left atria, and the right and left ventricles 3 chambers: the right and left atria, and the inferior ventricle 2 chambers: the right and left atriaIn a study of heart valve functions, it is necessary to inject a dye intothe right atrium of the heart by inserting a catheter into a blood vesseland moving the catheter into the right atrium. What route would yousuggest? If you wanted to do this procedure into the left atrium, whatwould you do differently?
- Erasistratus from Ceos identified the correct function (to prevent backward flow of blood from the right ventricle to the right atrium) of which of the following valves in the human heart? the pulmonary semilunar valve the right atrioventricular valve the bicuspid valve the aortic semilunar valve the left atrioventricular valveBlood 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.In the given table, three of the anatomical and physiological terms are similar or related; one does not belong with the other three. Choose the term that does NOT belong in each of the following groups. A B C D 1 Pulmonary Trunk Vena Cava Right Side of the Heart Left Side of the Heart 2 QRS Wave T Wave P Wave Electrical Activity of the Ventricles 3 AV Valves Closed AV Valves Opened Ventricular Systole Semilunar Valves Open 4 Tricuspid Valve Mitral Valve Bicuspid Valve Left AV Valve 5 Pulmonary Valve Umbilical Artery Pulmonary Vein Superior Vena Cava
- Which of the following structures of the heart is responsible for pumping the blood to the lungs? left atrium left ventricle right atrium right ventricle sinoatrial nodeWhich of the following is correct regarding the flow of blood in reference to the left side of the heart? a. Blood flows from the left atrium, through the bicuspid valve, into the left ventricle, through the aortic semilunar valve, and then into the aortic arch b. Blood flows from the left atrium, through the aortic semilunar valve, into the left ventricle, through the bicuspid valve, and then into the aortic arch c. Blood flows from the left atrium, through the bicuspid valve, into the left ventricle, into the aortic arch, through the aortic semilunar valve, and then into systemic arterial systemThe Belgian anatomist and physician Andreas Vesalius, in his textbook entitled De Humani Corporis Fabrica (published in 1543), made which of the following claims (contradicting one of Galen’s claims)? blood in the right ventricle of the human heart does not receive blood directly from the right atrium blood in the left ventricle of the human heart does not receive blood directly from the left atrium blood in the right ventricle of the human heart does not pass directly into the left ventricle blood in the right atrium of the human heart does not pass directly into the right ventricle blood in the left atrium of the human heart does not pass directly into the left ventricle
- Why do you think it is important for heart valves to ensure that blood flows in only one direction in the heart?40- In the brain the frontal lobe has Oa. Voluntary motor activity Ob. Speaking Oc. Reasoning Od. Problem solving Oe. All of the aboveThe heart’s pacemaker is called the (complete term)_________. The pacemaker is composed of specialized________. The pacemaker first sends impulses that stimulate contraction of both_______. The (complete term)________introduces a delay in the transmission of pacemaker signals into the ventricles. Signals are conducted from this node directly into fibers called the________ . If the pacemaker loses control of heart contractions, ineffective quivering of the heart muscle, called_________, may occur.