Anatomy and Physiology

2156 Words Sep 25th, 2015 9 Pages
Anatomy and Physiology Task 1

1. Discuss your dissection of the sheep heart and the cardiovascular system of the fetal pig by doing the following:
a. Describe the similarities and differences between the fetal pig heart and the sheep heart.
1. Size
2. The left ventricular wall is thicker in the sheep than the fetal pig.
They both have 2 atria and 2 ventricles.
b. Describe the four valves of the heart, including their name, location, and function.
The four valves of the heart are the tricuspid valve, the pulmonic valve, the mitral valve, and the aortic valve.
The tricuspid valve: It is located between the right atria and the right ventricle. It is comprised of three “flap-like cusps” which when in
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c. Discuss the similarities and differences between the left and right sides of the heart.
Similarities between the left and right side of the heart:
The left and right sides of the heart both consist of 2 chambers, an upper atria and a lower ventricle. They are both comprised of cardiac muscles which contract involuntarily to pump blood. Each side of the heart contains valves which prevent the regurgitation of blood. The left and right side of the heart have a mutual muscular segment by which they are separated and is known as the atrioventricular septum.
Differences between Left and Right Side of the Heart?
• Left side of the heart operates at a level up to 125 mmHg, whereas the right side of the heart operates at 25 mmHg.
• Right side drives a short, low pressure pulmonary circulation while the left side drives longer, high pressure systemic circuit.
• Wall of the left side of the heart is thicker than that of the right side.
• Right side circulates the deoxygenated blood while the left side circulates oxygenated blood.
• Right atrium receives blood from tissues and organs, and right ventricle pumps it to lungs. However, the left atrium receives blood from lungs and left ventricle pumps it to the rest of the body.
• Superior vena cava and inferior vena cava bring blood to right side of the heart but only pulmonary
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