The purpose of the pericardium is to secret fluids to lubricate the heart and reduce friction. It is basically a double sac of serous membranes.
Q2: Observe the blood vessels connecting to the heart. How do arteries differ from veins in their structure?
The arteries differ from the veins in which the walls of the arteries are thicker than that of veins.
Q3: Place your finger inside the auricle. What function do you think the auricle serves?
The auricle is an extension of the atria.
Q4: Observe the external structures of the atria and ventricles. What differences do you observe?
The walls of the ventricles are thicker than the atria.
Q5: Describe the coronary sinus, inferior vena cava, Right Atrioventricular Valve (Tricuspid Valve)
The coronary sinus receives blood from the coronary veins and it empties out to the right atrium in the heart. The inferior vena cava is a large vein that transfers blood to the heart.
Q6: Draw a picture of the tricupsid valve, including chordate tendinae and the papillary muscle.
Q7: Why is the "anchoring" of the heart valves by the chordate tendinae and the papillary muscle important to heart function?
The "anchoring of the heart valves by the chordate tendinae and the papillary muscle are important to the heart's function because it opens to allow blood to flow from the atrium to the ventricles. If it weren't for this, the heart would not be functioning properly.
Q8: Using pictures and/or words describe what you see.
As what I have learned, I see the bicuspid valve in the middle of the right atrium and the right ventricle with two cusps around the chordate tendinae attached onto in.
Q9: What is the function of the semi-lunar valves?
The semi-lunar valves have flaps that blocks blood from flowing back to the heart.
Q10: Valvular heart disease is when one of more heart valves does not work properly. Improperly functioning heart valves can lead to regurgitation, which is the backflow of blood through a leaky valve. Ultimately this can lead to congestive heart failure, a condition that can be life threatening.
a. If the valve disease occurs on the right side of the heart, it results in swelling in the feet and ankles. Why might this happen?
The right side of the heart fails where it cannot pump blood to the lungs as fast anymore. Therefore, the blood gets clogged that causes swelling in areas like the feet and ankles.
b. If the valve disease occurs on the left side of the heart, what complications would you expect to see?
Since the left side of the heart pumps more of the blood, it has to work even harder now to pump the same amount of blood as it use to.
Q11: Using pictures and/or words describe what you see.
I see the bicuspid valve that directs to the right ventricle. Then it leads up to the aortic semilunar valve. Then I see the anterior surface of the heart where the coronary arteries are located.
Q12:Describe how the left and right sides of the heart differ from each other.
The right side of the heart pumps blood to lungs to get oxygen while the left side of the heart receives the oxygen blood. It then pumps it to the body.
Q13: Draw and label all structures visible in the interior of the cross-section.
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