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.
Purkinje fibres are specialised fibres that do not contract but pass the electrical impulses to the base of the ventricles, with a short important delay of 0.1seconds. The ventricle contract shortly after the atria, from the bottom up, this squeezes the blood upwards into the arteries. The blood can’t enter the atria because of the atrioventricular valves which are forced shut. Diastole- The atria and the ventricles relax, while the atria fill with blood. Then the semilunar valves in the arteries close as the arterial blood pushes against them.
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
These valves are opened and closed depending on pressure differences between the atria and ventricles. They prevent the backflow of blood from the ventricles to the aorta in the second stage of the cardiac cycle. The second stage of the cardiac cycle is ventricular systole/atrial diastole. The atria relax and the ventricles contract. This decreases the volume of the ventricles and increases the pressure within them.
Right lymphatic duct b. Thoracic (left lymphatic) duct c. Right and left subclavian veins d. Cisterna chyli . e. Determine the direction of blood and lymph movement between arterioles, blood and lymph capillaries, and venules. Blood and lymph move between arterioles, blood and lymph capillaries, and venules through lymphatic capillaries. These capillaries are located in the spaces between cells and are closed at one end. Blood capillaries converge to form venules and then veins.
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.
Cardiac Catheterization Worksheet Name two reasons for a cardiac catheterization? Cardiac caths are used for many reasons some are: 1. To check the blood pressure and blood flow in the chambers of the heart. 2. Check the blood flow of the coronary arteries and help determine whether surgeries or other procedures are needed to open possible blocked blood vessels.
“Milk” the tube frequently to avoid blockage by fibrin plugs or clots. Change the connecting tube and bottle at least once every 48 hours. (Rajan, Kulkarni 2012) Assure placement by chest x-ray after insertion , monitor vital signs, breath sounds, tracheal deviation, respiratory status, and O2 saturation. (MICUNURSING 2011) Complications of chest tubes, blocked tube due to positioning. Sometimes the tube gets trapped in the major fissure of the lung.
The lungs add oxygen to the blood and remove carbon dioxide. Then the left side is responsible for accepting blood from the lungs and pumping it back out into the body. Think of it like a cycle where blood flows like this: From the body into the top right chamber (right atrium) -- down into the bottom right chamber (right ventricle) -- out to the lungs -- back to the top left chamber (left atrium) -- down to the bottom left chamber (left ventricle) -- then out to the body. The heart is innervated by the autonomic nervous system, but it also has its own system to generate electrical impulses that stimulate cardiac muscle to contract. These electrical impulses can be recorded in an ECG (electrocardiogram) and used to detect problems with the heart.
7. Ischemic heart disease a. Review the blood supply of the heart. Know what myocardial regions are supplied by each coronary artery and how to determine which coronary artery is dominant. b.