The Circulatory System

Access Code (located on the lid of your lab kit): Click here to enter text.

Pre-Lab Questions:

”1. Describe the pathway of blood traveling through the closed system of the circulatory system starting with the right atrium.”

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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? ”

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Experiment 1: Microscopic Examination of Blood Vessels

Post-Lab Questions

”1. Label each of the items in the following slide pictures based on your observations. ”

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B- Click here to enter text.

C- Click here to enter text.

D- Click here to enter text.

E- Click here to enter text.

F- Click here to enter text.

G- Click here to enter text.

”2. What differences did you observe in the structure of an artery versus the structure of a vein? ”

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”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

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Arteriole

Pulmonary Artery

Capillary

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Venule

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Vein

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Pulmonary Vein

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”4. Which vessels allow diffusion of oxygen and nutrients across their cell layers? ”

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”5. List the vessels in order of ascending pressure within the circulatory system. ”

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Experiment 2: Virtual Model – The Circulatory System

Insert screenshot of the descending aorta:

Insert screenshot of the brachial veins:

Insert screenshot of the femoral artery:

Post-Lab Questions

”1. In what body region does the aorta originate? ”

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”2. What organ does the renal artery supply?”

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”3. What branch of the external carotid artery supplies the chin/jaw region with blood?

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4. Is the common iliac artery anterior or posterior to the common iliac vein?

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”5. What is the name of the artery in the pelvic region that directly feeds into the femoral artery?

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Experiment 3: Blood Pressure

Table 2: Blood Pressure and Pulse Readings

Activity

Blood Pressure (Systolic/Diastolic; mmHg)

Pulse (beats/minute)

Basal (Normal)

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Lying Down

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After Exercise

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Post-Lab Questions

”1. What is systolic pressure? Diastolic pressure? ”

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”2. Why is pressure a sensible reading to measure circulatory health? ”

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”3. Explain the “lub-dub” sounds of the heartbeat. ”

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”4. Why do blood pressure and heart rate change after exercise? ”

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”5. How might the results in Table 2 change if someone else preformed the activities? Why? ”

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”6. Why is it important for blood to flow in only one direction? ”

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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? ”

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

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”Insert photo of your pig’s exposed heart, aorta, and jugular vein with your name and access code handwritten clearly in the background: “