Question

93 A. Describe the anatomy of the heart, including vascular supply and pericardium stractr and trace the flow of blood through the heart, identifying the major blood vessels, chamber, and heart valves 93 B. Define cardiac output, describe the factors that influence heart rate and stroke volume, and explain how adjustments in stroke volume and cardiac output are coordinated at different levels of physical activity
can you please write brief essay to answer the question. there should be an introduction, a body and a conclusion

Answer 1

Answer= 93.

Anatomy of heart is as follows:

The heart is located between lungs in the middle of your chest,behind and slightly to the left of sternum.A double layer pericardium surrounds heart like a sac.The outer layer of pericardium surrounds the roots of hearts major blood vessels and is attached by ligaments to spinal column,diaphragm and other parts of body.The inner layer of pericardium is attached to heart muscle.

The heart has 4 chambers.The upper chambers are called the left and right atria,and lower chambers are called the left and right ventricles.The left ventricle is the largest and strongest chamber in heart.The left ventricle's chamber wall are only about a half-inch thick.

four The heart valves:

4 valves regulate the blood flow through heart:

1.The tricuspid valve - This valve regulates the blood flow between the right atrium and right ventricle.

2.Pulmonary valve - Controls the blood flow from right ventricle into the pulmonary arteries,which carry blood to lungs to pick up oxygen.

3.Mitral valve - lets oxygen rich blood from lungs pass from the left atrium into the left ventricle.

4.Aortic valve - opens the way for oxygen rich blood to pass from left ventricle into the aorta.

Blood flow through the heart is =

The right side of the heart receives deoxygenated blood and sends it to the lungs.the left side of heart receives blood from lungs and pumps it to the rest of the body.

The atria and ventricles contract and relax ,producing a rhythmical heartbeat.

right side - the right atrium receives deoxygenated blood from the body through veins called as superior and inferior vena cava.

The right atrium contracts and blood passes through to the right ventricle.

once the right ventricle is full,it contracts and pumps the blood through to the lungs via the pulmonary artery ,where it picks up oxygen and offloads carbon dioxide.

Left side- newly oxygenated blood returns to the left atrium via the pulmonary vein.

-The atrium contracts ,pushing blood into the left ventricle.

-Once the left ventricle is full,it contracts and pushes the blood back out of the body via the aorta.