Question

Laboratory Review 14 Planes . What blood vessels connect arterioles to venules and exchange molecules will Superiort inferior fuid? venstava. Which blood vessels return blood to the right atrium? Does the pulmonary artery carry blood back to or away from the heart Bich 4. Is the blood entering the left ventricle 0,-poor or 0,-rich? Or Whal valve prevents the backflow of blood when the left ventricle relaxes? Sus i W hich circuit delivers blood to the spleen, the pulmonary or the systemie b ak l ave What vessel transports blood to the liver from the digestive tract? Rich & Do pulmonary veins carry 0,-poor or O-rich blood? Porta In addition to the esophagus and the posterior vena cava, what structure passes through the diaphragm? regular 10. What is the name of the veins that serve the neck and head regions of the body? Lain duoden oath at any . What organs are served by the anterior mesenteric artery? Lilac 12. What arteries form from the branching of the posterior end of the aorta? 13. What is the name of the vein that is joined to the posterior vena cava by the venous duct (ductus venosus)? (Hint: it was cut when the abdominal cavity was exposed.) 14. Which type of blood vessel (artery or vein) has a thick wall with a lot of smooth muscle that helps regulate blood pressure? Atery Thought Questions 15. Explain why narrowing or blockages of the coronary arteries can be life threatening, and identify which arteries, when blocked, increase the risk of having a stroke. 16. Explain why an airline recently introduced an exercise video to combat deep vein thrombosis (clots that form in deep veins after prolonged inactivity). Consider the pressure of blood in veins and venous structure in your reply. 17. In figures illustrating arteries and veins, arteries usually appear red and veins usually appear blue. Explain why the pulmonary arteries seen in Figure 14.2 appear blue and the pulmonary veins in Figure 14.2 appear red. 192 Laboratory 14 Cardiovascular System

Answer 1

Answer 13) Umbilical vein

Answer 15) Before we begin, what exactly is coronary artery? they are the arteries that supply the blood, the oxygenated one to the muscles of the heart for its function, whenever due to reasons like obesity etc (resulting in cholesterol plaques getting accumulated in the veins causing a condition called atherosclerosis) there is narrowing of these arteries, there is an altered delivery of blood reaching the heart which can have dangerous complications of the heart for eg the person can face coronary artery disease, angina, breathlessness, less oxygen supply to thej body with the worst resulting complication of heart attack. The Left Anterior Descending Artery is the most commonly impacted.

Answer 16 ) Before we begin to answer this question, we need to know in simple language what Deep Vein Thrombosis basically is. DVT is condition wherein there is blood clot that forms in the inside of the vein which is either llocated near the thigh or deep down at the level of the foot. This clot solidifies and hardens in the due course of time. The clot is more likely to be formed during the periods of inactivity wherein there is no movement of the blood in the leg, which is more likely to happen when the leg is rested for long periods of time, or rather when there is no movement of the leg, therefore while sitting in the same posture during the flights and to avoid the risk of DVT, the airlines have started showing the video clips of the exercises that one can do while being seated in the flight, mostly when the flights are of lomg hours. now compared to arteries, the pressure with which the blood flows through the veins is much lighter therefore if at all there is DVT, there will be decrease in the venous return and hence ultimately causes increase in the blood pressure leading to other severe health complications.

Answer 17) The main reason why the arteries are depicted in red colour is because they carry oxygenated blood in the body while the veins are depicted in blue colour because they carry deoxygenated blood in the system, but this has an exception, the pulmonary arteries are blue in colour because they are the arteries which carry the deoxygenated blood from the right atrium to the lungs while the pulmonary vein transports the oxygenated blood from the lungs back to the left atrium. this is the reason why they are depicted with the exchanged colours in the diagram.

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