Writing Assignment
1. How does the heart change as it develops in a fetus?
As the heart first starts to develop after conception, it takes up most of the midsection of the fetus. Then it gradually starts to move up high in the chest cavity. After a few weeks, it takes it’s position where it will stay for the remainder of the life of the person.
The heart itself grows from a one chambered tube. Due to the limited space available in the fetus it twists to and fro, backwards to form two partially separated atria with one large ventricle. The next phase is marked by the two atria being completely separate and the ventricle’s beginning to part. Once the two ventricles completely separate, the heart is formed.
2. What is the largest vessel that is attached to the heart, and what does it do?
The largest vessel that is attached to the heart is the aorta. This carries nutrient filled blood to the rest of the body.
3. What is pulmonary circulation?
Pulmonary circulation is the circulation of blood from the heart to the lungs through the pulmonary artery and pulmonary veins. The heart pumps deoxygenated blood from the heart to the lungs and then the blood is sent back being oxygenated, where it is then pumped to the rest of the body.
4. The sound you hear when you listen to your heart with a stethoscope is actually what?
The sound you hear when you listen to your heart with a stethoscope is actually the sound of the heart valves opening and closing as they pump blood.
5. Distinguish between systole and diastole phases of the heart.
The systole phase is when arteries contract to send blood to the lungs and other parts of the body. The diastole phase is when the atria and ventricles become relaxed and the blood starts to flow to the left and right atria. They are different in that the systole phase requires the blood to be squeezed and pushed out while increasing the pressure in the arterial system. Diastole is when the heart is relaxed and becomes filled
As the heart first starts to develop after conception, it takes up most of the midsection of the fetus. Then it gradually starts to move up high in the chest cavity. After a few weeks, it takes it’s position where it will stay for the remainder of the life of the person.
The heart itself grows from a one chambered tube. Due to the limited space available in the fetus it twists to and fro, backwards to form two partially separated atria with one large ventricle. The next phase is marked by the two atria being completely separate and the ventricle’s beginning to part. Once the two ventricles completely separate, the heart is formed.
2. What is the largest vessel that is attached to the heart, and what does it do?
The largest vessel that is attached to the heart is the aorta. This carries nutrient filled blood to the rest of the body.
3. What is pulmonary circulation?
Pulmonary circulation is the circulation of blood from the heart to the lungs through the pulmonary artery and pulmonary veins. The heart pumps deoxygenated blood from the heart to the lungs and then the blood is sent back being oxygenated, where it is then pumped to the rest of the body.
4. The sound you hear when you listen to your heart with a stethoscope is actually what?
The sound you hear when you listen to your heart with a stethoscope is actually the sound of the heart valves opening and closing as they pump blood.
5. Distinguish between systole and diastole phases of the heart.
The systole phase is when arteries contract to send blood to the lungs and other parts of the body. The diastole phase is when the atria and ventricles become relaxed and the blood starts to flow to the left and right atria. They are different in that the systole phase requires the blood to be squeezed and pushed out while increasing the pressure in the arterial system. Diastole is when the heart is relaxed and becomes filled