Deoxygenated Blood Circulation

In a normal human being the heart correctly functions by the blood first entering through the right atrium from the superior and inferior vena cava. This blood flow continues through the right atrioventricular valve into the right ventricle. The right ventricle contracts forcing the pulmonary valve to open leading blood flow through the pulmonary valve and into the pulmonary trunk. Blood is then distributed from the right and left pulmonary arteries to the lungs, where carbon dioxide is unloaded and oxygen is loaded into the blood. The blood is returned from the lungs to the left

When the left ventricle is full, the bicuspid valve closes and the aortic valve opens. This allows the blood into the aorta and once the blood passes the aortic valve closes. Finally, the blood then has access through the rest of the body by systematic capillaries  veins  back to the right atrium.

Meaning The Sa node and Av node work together, forcing blood into the ventricles, which contract, forcing the blood to leave from the left side of the heart. The blood that enters the right side of the heart enters through veins as it is under less pressure. Blood with co2 in it will exit the right side of the heart through the pulmonary artery to the lungs where gaseous exchange occurs.

After the blood is received it is pumped through the right ventricle through the tricuspid valve. The tricuspid valve can be found in between the right ventricle and atrium, its main job is to contract to prevent blood from returning, and ensure that it is going the right direction. The blood continues to make its way to the lungs where it picks up oxygen and rids of carbon dioxide. Lastly, the ventricle pumps the blood to the lungs through the pulmonary valve. The pulmonary valve prevents blood from returning into the right atrium after the tricuspid valve relaxes. The pulmonary valve is a semilunar valve that has three cusps and is in between the right ventricle and the pulmonary artery.

It is considered to account for the most deaths during the first week of an infant’s life who suffers from a congenital heart defect (Texas Heart Institute, 2014). In a healthy heart, oxygen-poor blood returns to the heart from the body. The heart receives the blood through the veins and enters the right atrium where it then pushes the blood through the tricuspid valve into the right ventricle. From here, the blood moves through the pulmonary valve out of the heart via the pulmonary artery and into the lungs where it receives oxygen to be transported. The blood returns to the heart by the pulmonary veins into the left atrium where it is then passed through the mitral valve into the left ventricle. Oxygen-rich blood is pumped from the left ventricle into the aorta through the aorta valve where it is then sent throughout the body, returning to the right atrium to continue the cycle (American Heart Association,

On the right side of your heart, it is collecting and pumping blood to the lungs through the pulmonary arteries, in which your lungs are refreshing the blood with a new supply of oxygen, and removing any waste products (Heart Disease- Mayo Clinic). On the left side of your heart, it pumps more blood throughout the aorta ( the main artery), to supply tissues throughout the body with oxygen and nutrients( Heart Disease- Mayo Clinic).

The system circuit, starts via the left atrium and passing the mistral valve down into the left ventricle. The ventricle will then contract shortly after the atria have started relaxing and followed by the closing of the atrioventricular valves, so blood does not back wash into the atrium. Pressure will becoming higher in the left ventricle allowing ventricular systole 's second phase to begin by forcing blood through the aortic semi lunar valve up into the aorta so blood may reach the rest of the tissues in the body. Afterwards, the ventricles will becoming diastolic

As there is a hole in the wall separating the atria, the oxygenated blood from the left atrium enters the right atrium instead of the aorta. The oxygenated blood that entered the right atrium mixes with the deoxygenated

In a healthy functioning heart the blood flows from the superior and inferior vena cava the right into the right atrium. Blood flows from the right atrium pass the tricuspid valve into the right

The upper two chambers, atria, carry blood to the heart. The lower two chambers, ventricles, carry blood out of the heart. In the pulmonary circuit, blood flows from the veins to the right atrium to the right ventricle to the pulmonary arteries to the lungs. In the systemic circuit, blood flows from the left atrium to the left ventricle to the aorta to the branching arteries to the capillaries throughout the body. The heart has valves to prevent the backward flow of blood. Atrioventricular valves separate the atria and ventricles. The pulmonary valve and aortic valve separate the ventricles and arteries. A heartbeat is the sound the valves make as they open and

From the right atrium the blood moves into the right ventricle through the AV valve. When the ventricles contract the blood is moves through the semilunar valve into the pulmonary artery. This artery then branches off into the left lung and the right lung so that the blood can become oxygenated. The oxygen-rich blood returns to the left atrium of the heart through the pulmonary veins.

The cardiac system, as mentioned in the introduction, is comprised of three major parts: the heart, the blood vessels, and the blood itself. The heart is the primary mechanism that acts as a pump to establish a pressure gradient to move blood through the system using blood vessels. Without the heart in operation, the body would cease to have the vital flow of blood which contains necessary oxygen, nutrients, and waste needing to be disposed of. The vessels are the roads that blood travels through and they vary in size to increase or decrease blood pressure through them. This is how a sphygmomanometer and stethoscope combined can be used to show and derive how blood pressure.

As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated blood then passes through the aortic valve into the aorta to tissues and body organs.

The journey of the blood through the heart begins at the point when deoxygenate blood returning from the body is entering the hearts via the superior and inferior vena cava. From the right atrium the blood passes to the right ventricle via tricuspid valve. At this point ventricular contraction begins and forcing blood out of right ventricle via opened the semilunar valve. Blood is further pumped to the lungs via the pulmonary arteries. In lungs, blood collects oxygen and release the CO2. Oxygenated blood is returning to the left atrium through pulmonary veins and is carried to the left ventricle through biscupid valve. When contraction of heart happens again the blood from left ventricle is forced to the aorta and leaves the heart. Blood circulates

Blood circulation begins when the heart relaxes, blood flows from the two chambers of the heart, known as the atria, into the lower two chambers, the ventricles, which then expand. The systematic circulation has the left ventricle pumping oxygen rich blood into the aorta. The blood then travels from the main artery to the other arteries in the capillary network. The blood will be release the oxygen, nutrients and takes the carbon dioxide and waste. After that the blood travels in the veins to the right atrium and into the right ventricle. This leads to the pulmonary circulation, which “begins with the right ventricle pumping blood that has little oxygen into the pulmonary artery, which branches off into the other arteries and capillaries” (PubMed Health, 2012). The capillaries are where the carbon dioxide is released from the blood into the pulmonary vesicles and fresh oxygen enters the bloodstream. As we breathe out carbon dioxide is released from the body and oxygen enters the lungs when we breathe in. As the “oxygen rich blood travels through the pulmonary vein and