The Cardiac Cycle
The heart is a very important organ in the human body . It causes the flow of blood, which is essential to life and if there is even a minor problem in the heart, there can be severe repercussions for the patient. Blood is needed as it contains oxygen, as well as other important nutrients, hormones and white blood cells for the bodies defence mechanism. It is a mixture of cells and plasma. Blood also contains platelets, which can be used for clotting. The heart plays a central role in the circulatory system and adjusts itself to the level of oxygen needed , which depends on the level of activity being carried out.
The heart itself is a four chambered muscle and the main job of it is to pump blood around the body. It consists of four chambers, the right atrium, right ventricle, left atrium and left ventricle. The heart also contains valves to stop backflow and allow smooth flow of blood from systolic to diastolic positions. There are two atroventricular valves and two semilunar valves. Both sides of the heart vary from each other just a little bit , to allow the heart to function more efficiently. The left ventricle has a thick muscular wall, which allows it to generate high pressure during systole, the contraction . This is because it has to release high pressure oxygenated blood into the aorta.
The heart is a very important organ in the human body . It causes the flow of blood, which is essential to life and if there is even a minor problem in the heart, there can be severe repercussions for the patient. Blood is needed as it contains oxygen, as well as other important nutrients, hormones and white blood cells for the bodies defence mechanism. It is a mixture of cells and plasma. Blood also contains platelets, which can be used for clotting. The heart plays a central role in the circulatory system and adjusts itself to the level of oxygen needed , which depends on the level of activity being carried out.
The heart itself is a four chambered muscle and the main job of it is to pump blood around the body. It consists of four chambers, the right atrium, right ventricle, left atrium and left ventricle. The heart also contains valves to stop backflow and allow smooth flow of blood from systolic to diastolic positions. There are two atroventricular valves and two semilunar valves. Both sides of the heart vary from each other just a little bit , to allow the heart to function more efficiently. The left ventricle has a thick muscular wall, which allows it to generate high pressure during systole, the contraction . This is because it has to release high pressure oxygenated blood into the aorta.