straighterline-ap2-circulatory-lab-11

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Straighterline A&P2- Circulatory -Lab 11 Clinical Microbiology (Western Governors University) Studocu is not sponsored or endorsed by any college or university Straighterline A&P2- Circulatory -Lab 11 Clinical Microbiology (Western Governors University) Studocu is not sponsored or endorsed by any college or university Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

Lab 11 The Circulatory System BIO202L Student Name: Access Code (located on the lid of your lab kit): Pre-Lab Questions: ” 1. Describe the pathway of blood traveling through the closed system of the circulatory system starting with the right atrium. ” Blood travels through the circulatory system in this order: right atrium - right ventricle -pulmonary artery - lungs - pulmonary veins - left atrium - left ventricle - aorta - arteries - arterioles - capillaries - venules - veins - vena cava - back to the right atrium Alternatively, you may also draw a map of blood traveling through the closed circulatory system and insert it below ” 2. What are the main resistance vessels of the circulatory system? How are they controlled? ” The main resistance vessel of the circulatory system is the arterioles. They are controlled by dilating and constricting Experiment 1: Microscopic Examination of Blood Vessels Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

Lab 11 The Circulatory System BIO202L Post-Lab Questions ” 1. Label each of the items in the following slide pictures based on your observations. ” A- Tunica Adventitia B- Tunica Intima C- Tunica Media D- Lipids E- Tunica Intima F- Tunica Adventitia G- Tunica Media Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

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Lab 11 The Circulatory System BIO202L ” 2. What differences did you observe in the structure of an artery versus the structure of a vein? ” The structure of the artery has much more Tunica Media than the structure of a vein. Also the artery is much wider than the vein. ” 3. Explain the direction of blood flow and the type of blood (oxygenated or deoxygenated) found in each vessel in the pulmonary and systemic circuits. ” Vessel Direction State of Blood Artery Away from the heart. Oxygenated Arteriole Away from the heart. Oxygenated Pulmonary Artery Both, blood here has just left the heart, heading for the lungs, which will then reenter the heart. Deoxygenated Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

Lab 11 The Circulatory System BIO202L Capillary Both, at this level blood is exchanging gases back and forth. Both Venule Towards the heart Deoxygenated Vein Towards the heart Deoxygenated Pulmonary Vein Towards the heart Oxygenated ” 4. Which vessels allow diffusion of oxygen and nutrients across their cell layers? ” Capillaries allow diffusion across their cell layers. ” 5. List the vessels in order of ascending pressure within the circulatory system. ” The vessels in order of ascending pressure are Arteries, Arterioles, Capillaries, Venules, and Veins. Experiment 2: Virtual Model – The Circulatory System Insert screenshot of the descending aorta: Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

Lab 11 The Circulatory System BIO202L Insert screenshot of the brachial veins: Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

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Lab 11 The Circulatory System BIO202L Insert screenshot of the femoral artery: Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

Lab 11 The Circulatory System BIO202L Post-Lab Questions ” 1. In what body region does the aorta originate? ” The aorta originates in the heart region. ” 2. What organ does the renal artery supply? ” The renal artery supplies the kidneys. Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

Lab 11 The Circulatory System BIO202L ” 3. What branch of the external carotid artery supplies the chin/jaw region with blood? The branch of the external carotid artery that supplies the chin/jaw region with blood is called the Inferior labial artery 4. Is the common iliac artery anterior or posterior to the common iliac vein? The common iliac artery is anterior to the common iliac vein. ” 5. What is the name of the artery in the pelvic region that directly feeds into the femoral artery? The external iliac artery turns into the femoral artery. Experiment 3: Blood Pressure Table 2: Blood Pressure and Pulse Readings Activity Blood Pressure (Systolic/Diastolic; mmHg) Pulse (beats/minute) Basal (Normal) 110/70 72 Lying Down 100/60 60 After Exercise 130/86 120 Post-Lab Questions ” 1. What is systolic pressure? Diastolic pressure? ” Systolic pressure is the pressure in arteries when the heart is contracting. Diastolic pressure is the pressure in arteries when the heart is relaxed. ” 2. Why is pressure a sensible reading to measure circulatory health? ” Pressure is a sensible reading to measure circulatory health because pressure relates to how hard the heart is working. A distressed heart will have high pressure just as low pressure is an indication of something wrong with the circulatory health. ” 3. Explain the “lub-dub” sounds of the heartbeat. ” The “lub” sound of the heartbeat is when the Atrioventricular AV valves close. The “dub” sound is when the semilunar valves close. ” 4. Why do blood pressure and heart rate change after exercise? ” Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

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Lab 11 The Circulatory System BIO202L Blood pressure and heart rate increase after exercise due to the extra need of oxygen to the muscles. More oxygen is needed therefore the heart increases the heart beats and blood pressure to get more blood flowing and delivering more oxygen throughout the body. ” 5. How might the results in Table 2 change if someone else performed the activities? Why? ” The results may differ because my arm was held rigidly in order to perform the blood pressure reading but if someone else was doing it my arm would be more relaxed which might change the pressure reading. ” 6. Why is it important for blood to flow in only one direction? ” It’s important for blood to flow in only one direction so that blood gets through the pulmonary circuit and exchanges gases in the correct order. Otherwise deoxygenated blood may be delivered to areas of the body which might cause cellular or tissue death or an infarction. Experiment 4: Fetal Pig Dissection: The Circulatory System Post-Lab Questions ” 1. What is the process that is responsible for moving molecules from an area of high concentration to an area of low concentration? In what part of the circulatory system does this happen? ” Diffusion is the process that is responsible for moving molecules from an area of high concentration to an area of low concentration. In the circulatory system diffusion takes place in the capillaries. ” 2. What observations did you make about the fetal pig’s circulatory system? ” The observations that I made about the fetal pig’s circulatory system, are that it is so similar to humans. I also felt that the heart is very hard or stiff compared to other organs. ” Insert photo of your pig’s exposed heart, aorta, and jugular vein with your name and access code handwritten clearly in the background: “ Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

Lab 11 The Circulatory System BIO202L Downloaded by shade mobley (smobley18@capellauniversity.edu) lOMoARcPSD|23679171

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