From the lungs, blood drains into the left atrium and is then pumped into the left ventricle. The left ventricle then pumps this oxygen-rich blood out into the aorta which then distributes it to the rest of the body through other arteries. The heart is a hollow, muscular organ; its job is to pump blood through a network of blood vessels. The vessels form a circle, which starts at the heart, goes out through the body, then ends back at the heart again. The heart has two sides, the right and the left side.
These four chambers are separated from each by various valves. The tricuspid valve separates the right atrium and right ventricle and the mitral separates the left atrium and left ventricle. Two valves separate the ventricles and the large blood vessels. The aortic valves separates the left ventricle and the aorta and the pulmonic valve which separates the pulmonary artery and the right ventricle. The blood vessels are a intricate network of tubes that transport blood throughout the body.
Cardiac Cycle * The heart is a muscle that pumps blood throughout the body. Of course, the process is not quite that simple. The heart has four chambers, two on the right (right atrium and right ventricle) and two on the left (left atrium and left ventricle). The right side is responsible for accepting blood from the body and getting it to the lungs. The lungs add oxygen to the blood and remove carbon dioxide.
2. Trace the pathway of a single red blood cell through the pulmonary and systemic circuits starting with the right atrium. Name all chambers, valves, and vessels that this RBC passes through in the correct sequence. 1. On the right atrium receives deoxygenates red blood cell travel back in heart through the superior and inferior vena cavaes.
The capillaries are part of the cardiovascular system. The oxygen binds with the haemoglobin, which is a red pigment located in the red blood cells. The oxygen is transported to the pulmonary veins and oxygenated blood is pumped to the left side of the heart. From the left ventricle, the oxygenated blood is pumped through the aorta, travels to smaller arteries until it reaches the capillaries. The oxygen from the oxygenated blood moves out from the capillaries and travels to the cells of the body.
Once the impulse reaches the AV node, it is delayed there before being conducted through the fast conduction network of the bundle of His (located in the septum), down the left and right bundle branches and finally arriving at the Purkinje fibres to the myocardium of the ventricles. The time taken for an impulse from the SA node to reach the Purkinje fibres is represented as the P-R interval on the ECG. This enables the ventricles to contract (ventricular systole) from the apex to the base of the heart in a coordinated fashion and allow the blood to exit the ventricles via the aorta and pulmonary artery, which is represented as
Carbon dioxide is released by the red cell, easily passes through the capillary wall into the space in the air sac of the adjacent alveoli, and is then eliminated with each breath out of the mouth (exhalation). Oxygen present in the air sac easily passes into the capillaries and into the red blood cells. The capillary network carrying this oxygen-rich, bright red blood empties into the left side of the heart where it is pumped to all the tissues of the body. Thus, the cycle or circle of blood is complete; hence, the name
The right ventricle and atrium are responsible for receiving blood from veins. Deoxygenated blood (blood rich in carbon dioxide) enters the heart via the right atrium. The blood is then released from the
The right femoral vein is located in the thigh and pelvic region of the body. It is responsible for taking blood from areas in the lower region of the body to the heart via the inferior vena cava. Once we are inserted into the right femoral vein we will travel with the flow of blood through the heart and into the lower lobe of the right lung. From there we will make our way out of the body through the nose. I will explain what we see as we see it and each part of the body that we travel through.
Ventricle pumps blood into PULMONARY trunk (almost immediately branches into the pulmonary arteries), which carries deoxygenated blood to the lungs away from the heart. 5) Blood becomes OXYGENATED in the lungs, and then travels to LEFT ATRIUM in PULMONARY VEIN (carries oxygenated blood towards heart). 6) From the LEFT ATRIUM, blood passes through bicuspid valve into the LEFT VENTRICLE 7) REPEAT!! * As blood flows away from the heart, it transported to the body’s organs and tissues in relatively large vessels. * HEART ARTERIES ARTERIOLES CAPILLARIES VENULES VEINS 3.