AP 5069 L11 Circulatory PDF

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The Circulatory System PRE-LAB QUESTIONS ANNA STALLINGS 1. Starting with the right atrium, draw a map of blood traveling through the closed circulatory system.

2. What are the main resistance vessels of the circulatory system? How are they controlled? The main resistant vessels are the arterioles. They are controlled by hormones and the sympathetic nervous system.

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The Circulatory System EXPERIMENT 1: MICROSCOPIC EXAMINATION OF BLOOD VESSELS Post-Lab Questions 1. Identify the indicated components in the slide image below.

A__tunica intima_______

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The Circulatory System B___elastic intuna______

C___Tunica adventina___

3. Identify the indicated components in the slide image below.

A_tunica intima______

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The Circulatory System B_tunica media_________________

C___tunica adventina_______________

D__________________

4. What differences do you observe in the structure of an artery versus the structure of a vein? Arteries are larger than veins and carry blood away from the heart. Arteries are valveless and carry more oxygenated/pressured blood. They are more elastic.

5. Explain the direction of blood flow and the type of blood (oxygenated or deoxygenated) found in each vessel in the pulmonary and systemic circuits. The pulmonary circuit carries blood away from the heart and carries deoxygenated blood to the lungs. Veins carry oxygenated blood to the heart.

6. Which vessels allow diffusion of oxygen and nutrients across their cell layers? Capillaries

7. List the vessels in order of ascending pressure within the circulatory system. Artery, Arterioles, Capillaries, Vanuoles, Veins

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The Circulatory System EXPERIMENT 2: VIRTUAL MODEL – THE CIRCULATORY SYSTEM Post-Lab Questions 1. In what body region does the aorta originate? Ventricle

8. Into what organ(s) does the renal artery empty? Kidneys

9. What artery supplies the chin/jaw region of the head with blood? inferior alveolar artery

10. Is the common iliac vein anterior or posterior to the femoral artery? Anterior

11. What is the name of the artery in the pelvic region that directly feeds into the femoral artery? External iliac artery

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The Circulatory System EXPERIMENT 3: BLOOD PRESSURE Data Tables Table 2: Blood Pressure and Pulse Readings Activity

Blood Pressure (Systolic/Diastolic; mmHg)

Pulse (beats/minute)

Basal (Normal)

100/64

65

Lying Down

101/62

70

After Exercise

120/60

100

Post-Lab Questions 1. What is systolic pressure? Diastolic pressure? Systolic pressure is the pressure from your arteries and diastolic pressure is the pressure between heart beats.

12. Why is pressure a sensible reading to measure circulatory health? Pressure correlates with how hard the heart pushes blood.

13. Explain the “lub-dub” sounds of the heartbeat. The lub-dub is the sound of the heart chambers opening and closing.

14. Why do blood pressure and heart rate change after exercise? Your muscles need more oxygen when your exercising causes the heart to circulate your blood faster. This causes an increase in pressure and the heart rate.

15. How might the results in Table 2 change if someone else performed the activities? Why? Everyone’s blood pressure and pulse rate varies.

16. Why is it important for blood to flow in only one direction? It keeps from oxygenized and deoxygenized blood mixing together. ©eScience Labs, 2016

The Circulatory System

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The Circulatory System 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?

17. What observations did you make about the fetal pig’s circulatory system?

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