1. In the mammalian circulatory system, what path does deoxygenated blood take when travelling toward the heart? a. It enters the right atrium of the heart via the superior and inferior vena cava. b. It passes through the capillaries to the arterial system, then enters the right ventricle of the heart. c. It travels to the lungs, via the pulmonary vein, then enters the left ventricle of the heart via the inferior vena cava. d. It enters the left atrium of the heart via the aorta and is then pumped into the right atrium. e. It enters the right ventricle of the heart via the superior vena cava. 2. Inflammation of the airways is known as a. Meningitis b. Bronchitis c. Emphysema d. all of the above e. none of the above 3. Dissection of a heart reveals variation in muscle thicknesses among the heart chambers. Which statement best explains a reason for this variation in muscle thickness? a. The left atrium is thicker because it receives only small amounts of blood from the lungs. b. The right atrium is thinner because it must be able to stretch and then propel blood through all four chambers of the heart. c. Both ventricles are thicker than the atria because the ventricles propel the blood to the lungs. d. The right ventricle is thicker because the increased rigidity of the wall correlates with lower blood pressure delivered to delicate lung tissues. e. The left ventricle is thicker because more muscle is required to propel blood to the systemic system. 4. In humans, the concentration of carbon dioxide in the plasma: a. Causes increased production of hydrochloric acid b. Regulates gastric acid production by forming carbonic acid c. Increases the levels of nitrogen gas in the blood d. Regulates breathing rate by its effect on the medulla oblongata e. Causes inflammation of the tissues by its effects on the medulla oblongata
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Then, it passes through the tricuspid valve and enters the right ventricle. From the right ventricle, it is pumped through the pulmonary valve and into the pulmonary artery, which carries it to the lungs for oxygenation. After oxygenation, the blood returns to the Show more…
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Activity #2. Pulmonary circulation: Put the events listed below in order of occurrence, starting with the blood's return to the right atrium. Some events may occur simultaneously and some events may be erroneous and never occur... De-oxygenated blood travels from the right atrium through the left atrioventricular orifice into the left ventricle De-oxygenated blood returns to left atrium via the superior vena cava De-oxygenated blood flows from the pulmonary trunk into the right and left pulmonary arteries De-oxygenated blood is pumped from the right ventricle through the pulmonary semilunar valve into the pulmonary trunk Oxygenated blood returns to the right atrium via the superior vena cava Oxygenated blood travels from the left atrium through the left atrioventricular orifice into the left ventricle De-oxygenated blood flows from the pulmonary veins into the lungs De-oxygenated blood returns to the right atrium via the superior vena cava De-oxygenated blood travels from the right atrium through the right atrioventricular orifice into the right ventricle Oxygenated blood travels from the right atrium through the right atrioventricular orifice into the right ventricle Oxygenated blood is pumped from the right ventricle through the aortic semilunar valve into the ascending aorta Oxygenated blood flows from the pulmonary trunk into the right and left pulmonary arteries De-oxygenated blood returns to the right atrium via the inferior vena cava De-oxygenated blood travels from the right atrium through the right aortic semilunar valve into the right ventricle De-oxygenated blood flows from the pulmonary trunk into the right and left pulmonary veins De-oxygenated blood flows from the pulmonary arteries into the lungs De-oxygenated blood is pumped from the left ventricle through the aortic bicuspid valve into the ascending aorta De-oxygenated blood flows from the lungs into the right atrium Oxygenated blood flows from the lungs into the left atrium Oxygenated blood is pumped from the left ventricle through the aortic semilunar valve into the aortic arch De-oxygenated blood is pumped from the right ventricle through the aortic semilunar valve into the pulmonary trunk Oxygenated blood travels from the left atrium through the left semilunar valve into the left ventricle Oxygenated blood is pumped from the left ventricle through the aortic semilunar valve into the ascending aorta De-oxygenated blood flows from the lungs into the left atrium
Adi S.
Column A: Descriptions 1. Lower chamber of the heart which pumps blood low in oxygen 2. The body's largest artery carries blood away from this chamber of the heart 3. 5.0 - 5.5 liters per minute when a healthy adult is at rest 4. This type of vessel carries blood toward the heart 5. The endocardium, which lines the chambers of the heart, is made of this type of tissue 6. The connective tissue case that surrounds the heart 7. This can be palpated on the radial artery at the wrist 8. This type of vessel contains smooth muscle tissue which controls blood flow to organs by undergoing vasoconstriction & vasodilation 9. Nutrient and waste exchange occurs across these vessels; walls of these vessels are 1 cell thick 10. Coagulation is a part of this process to reduce blood loss from vessels with damaged walls 11. In a healthy adult at rest, this is about 70-75 beats per minute 12. Flow of blood from the right side of the heart, through the lungs, and back to the left side of the heart 13. This part of the nervous system causes a decrease in heart rate while relaxing 14. The first heart sound is made shortly after these structures close 15. The LAST portion of the conduction system of the heart; it conducts impulses directly to cardiac muscle tissue in the ventricle walls Column B: Terms A. pericardial sac B. right atrium C. left ventricle D. heart rate E. cardiac output F. arteries G. veins H. capillaries I. sinoatrial node J. pulse K. left atrium L. pulmonary circuit M. semilunar valves N. atrioventricular valves O. atrioventricular node P. systemic circuit Q. right ventricle R. stroke volume S. parasympathetic T. hemostasis U. sympathetic V. epithelial tissue W. Purkinje fibers X. connective tissue Y. semilunar valves Z. cardiac muscle tissue
Madhur L.
Put in Order (arrange these structures in the order in which blood passes through them-assume that the blood is about to leave the right atrium) aorta aortic semilunar valve left ventricle left atrium lungs mitral valve pulmonary semilunar valve pulmonary artery right ventricle superior/inferior vena cava tissues of the body tricuspid valve Fill-in (complete each statement with the correct term) 1. The flaplike lateral wall of each atrium is called the __? 2. The __? valve is also known as the mitral valve or left AV valve. 3. The right AV valve is also known as the __? valve. 4. The aortic semilunar valve has __? pocketlike flaps of tissue. 5. The __? are fibrous structures that prevent the cuspid valves from prolapsing (bending backward). 6. One-way flow of blood from the right ventricle is ensured by the presence of the __? valve. 7. Mitral valve prolapse, which is abnormal, may allow blood to enter the __? during contraction of the left ventricle. 8. The small cardiac vein and right coronary artery can be found along the rig-- __? sulcus. 9. The great cardiac vein and anterior interventricular artery can be found along the anterior __? sulcus. 10. The __? is a muscular wall between the left and right ventricles. 11. The myocardium of the __? ventricle is thicker than the other ventricle. 12. The wall of the aorta is thicker/thinner than the wall of the superior vena cava. 13. The __? are beamlike processes of the inner face of the myocardium. 14. The "point" of the heart is called the __? . 15. In the sheep heart, the right atrium is __? to the right ventricle.
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