The heart is a muscular organ the size of a clenched fist situated in the middle of the chest tilted slightly to the left. The heart receives its own oxygenated blood supplied by the coronary arteries and the coronary veins that take away the deoxygenated blood. The heart is made up of four chambers the left and right atrium and the left and right ventricle. The oxygenated blood travels from the lungs through the pulmonary veins, the pulmonary vein are the only veins in the body that carry oxygenated blood to the heart, the blood then enters the left atrium the blood is then pushed through the bicuspid valve, where the blood now enters the left ventricle where the blood is then pumped through the aortic valve into the aorta where the oxygenated …show more content…
(Steve Parker 2007) The hearts wall are made of a special muscle known as cardiac muscle this type of muscle is only found in the heart because of its uniqueness, the muscle needs the ability to constantly contract without becoming weak or tired and to maintain this the muscle needs a continuous supply of oxygenated blood from the coronary arteries. The left and right side of the heart is divided by the septum, the septum also does not allow oxygenated and deoxygenated blood to mix and also helps support the …show more content…
The smallest of all vessels are the capillaries which are one cell thick, the pressure is very low and gas exchange happens in the capillaries. A myocardial infarction (heart attack) happens when coronary arteries get blocked this effects the supply of blood and oxygen to this part of the heart which can cause the heart muscle to die off from lack of oxygen and nutrients, if the muscle has died it will be replaced with scar tissue. Atherosclerosis is where arteries become clogged with plaques or atheroma which are cholesterol and excess fatty substances, these cause the arteries to harden and do not let the proper blood supply flow which can stop organs functioning properly. These plaques can rupture which causes a blood clot, the blood clot then blocks the hearts blood supply causing the hearts muscle to be deprived of oxygen and may result in the muscle dying.After a heart attack the hearts function may not be the same some complications can be Arrhythmia (abnormal heart beats) such as Tachycardia (heart beating too fast) Bradycardia (too slow) or Atrial Fibrillation (irregular heart
The cardiovascular system helps blood circulate through a network of vessels in the body to give single cells oxygen and nutrients. The cardiovascular system in our body consists of the heart and blood vessels which are further more split in to capillaries, arteries and veins. The human heart pumps the blood via the blood vessels and is split in to four sections. The right side of the heart moves poorly oxygenated blood and the left side is responsible for moving highly oxygenated blood. Oxygenated blood that is pumped throughout the body by the arteries which is then supplied to the body tissue as they need to survive.
The contraction of the ventricles opens the semi lunar valves, forcing blood into the pulmonary and aorta arteries. The ventricles now relax (diastole) and any backflow of blood causes the semilunar valves to close (causing the second sound of the heart beat). Cardiac muscle never tires. The heart has its own
The heart is a hollow muscle that is about the size of a fist. In one minute, it pumps about five liters (roughly five quarts) of blood through the body, it is made up of four chambers as shown in Figure 2 .1 Right Atrium (RA), Left Atrium (LA), Right Ventricle (RV), Left Ventricle (LV). An ECG is a diagnosis tool that reported the electrical activity of heart recorded by skin electrode. The morphology and heart rate reflects the cardiac health of human heart beat [16].
The heart is a double sided muscular pump nestled between the two lungs in the centre of the chest, behind the breastbone. The muscular organ keeps the blood circulating around the body. The mammalian circulatory system is known as a double circulatory system because, on every circuit of the body, blood passes through the heart twice. The mammalian heart consists of four chambers: the right and left atria (singular atrium) and the right and left ventricles.
In these cases, the heart may beat too many times, not enough times, or even stop beating for a time. When the heart cannot pump enough blood to meet the body 's needs, this is known as heart failure. All of these issues are related to the underlying problem of coronary heart disease. Risk factors for CHD include smoking, high cholesterol, high blood pressure (anything over 130/80), obesity, diabetes, a family history of coronary heart disease, and old age. In men, the risk for coronary heart disease increases each year after 45.
The heart is located at the center of the chest, and is surrounded by the ribcage and protected by the breastbone. The heart’s main function is to keep blood continually circulating throughout the body. Arteries are the vessels that supply the body with oxygen rich blood; on the contrary the vessels that return blood to the heart are called veins. Like any other muscle in the body, the heart depends on a steady supply of oxygen rich blood. The arteries that carry this blood supply to the heart muscle are called coronary arteries.
Cells in the heart muscle that do not receive enough oxygen-carrying blood begin to die. The
It is a indication of an primary heart problem, generally coronary heart disease (CHD). Arrhythmia: An arrhythmia defines an unbalanced heartbeat the heart may beat too fast (tachycardia), too slowly (bradycardia), too promptly (premature contraction), or irregularly (fibrillation). Arrhythmias arise when the electrical indicators to the heart that manage heartbeats are not working appropriately. Several heart arrhythmias are not hurtful.
The heart is formed of two ventricles and two atria.(37) Each ventricle is cone shaped, with thick wall, pointed apex and broad base.(37) The two ventricles
Thus, the pericardial cavity allows the heart movement to be flexible. The pericardial cavity surrounds the heart totally except at the inlet and outlet of the cardiac vessels, where they form two significant tubes. One of the tubes serves as an interconnection to the inferior and superior vena cava and the pulmonary veins, whereas the other connects the aorta and the pulmonary trunk. Blood Supply and Innervation of the
The heart consists of muscles that pumps blood, arteries that supply blood to the heart muscle, and valves that ensure that the blood within the heart is pumped in correct direction. Problems can arise in any of these areas. Like cardiovascular disease, heart disease is a term that's somewhat loose and broad, and it's often used that way. 5.1 Personal Context: I have come across many patients with heart diseases.
The correct side of the heart, including the correct chamber and ventricle, gathers and pumps blood to the lungs through the pneumonic conduits. The lungs revive the blood with another supply of oxygen. The lungs additionally inhale out carbon dioxide, a waste item. Oxygen-rich blood then enters the left half of the heart, including the left chamber and ventricle.
The pressure changes in the four chambers on the heart (two atria’s and two ventricles) allow the blood to continuously flow in one direction. This is also aided by the valves (artioventricular and semi lunar valves). The circulatory system consists of the heart as well. The heart is a complex
When its full the pressure causes the bicuspid and tricuspid valves to open and blood flows into the ventricles. Contraction of each atrium now forces any remaining blood into the ventricles. The ventricles now contract (systole) and the atria relax (diastole). The pressure closes the bicuspid and tricuspid valves causing the first sound of the heartbeat. The contraction of the ventricles opens the semilunar valves, forcing blood into the pulmonary artery and aorta.
Experts remedies highly effective best tips, Unhealthy heart signs Signs, symptoms of unhealthy heart – Symptoms of unhealthy heart The heart works in our body all the time. At the beginning of its failure, it reveals some symptoms, which people ignore. Your heart needs investigation as soon as these symptoms appear. Due to heart disease, do you have a problem of heart disease?