28 Sep Describe the pathway of blood traveling through the closed system of the circulatory system starting with the right atrium.

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Pre-Lab Questions:

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

 

2.            What are the main resistance vessels of the circulatory system? How are they controlled?

 

Experiment 1: Microscopic Examination of Blood Vessels

 

Post-Lab Questions

 

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

 

 

A-

 

B-

 

C-

 

D-

 

E-

 

F-

 

G-

 

2.            What differences did you observe in the structure of an artery versus the structure of a 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            Away from the heart      oxygenated

 

Capillary               Away from the heart      oxygenated

 

Venule To the heart       deoxygenated

 

Vein       To the heart       deoxygenated

 

Pulmonary Vein                To the heart       oxygenated

 

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

 

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

 

Experiment 2: Virtual Model – The Circulatory System

 

 

 

1.            In what body region does the aorta originate?

 

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

 

3.            What artery supplies the chin/jaw region of the head with blood?

 

4.            Is the posterior tibial artery anterior or posterior to the small saphenous vein?

 

5.            What is the name of the artery which branches off from the femoral artery in the pelvic region?

 

Experiment 3: Virtual Model – Circulatory System Coloring Activity

 

Insert images in the indicated spaces below:

 

 Circulatory System – Thorax:

 

Circulatory System – Superior Lower Limbs:

 

Circulatory System – Inferior Lower Limbs:

 

 Circulatory System – Head:

 

Experiment 4: Blood Pressure

 

Activity                                 Blood Pressure (mmHg) Systolic/Diastolic             Pulse (beats/minute)

 

Basal (Normal)                 

 

Lying down                        

 

After exercise                  

 

Post-Lab Questions

 

1.            What is systolic pressure? Diastolic pressure?

 

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

 

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

 

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

 

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

 

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

 

Experiment 5: 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?

 

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

 

Insert photo of your pig’s exposed heart, aorta, and jugular vein with your name clearly visible in the background: