Veins transport blood to the heart and lungs at low pressure after receiving it from the capillaries. Valves inside the veins keep blood moving in one direction. The human body's arterial system branches out from one main artery, the dorsal aorta. Like veins, arteries have three layers: an outer layer of tissue, an inner layer of epithelial cells and a layer of muscle in between. Arteries deliver oxygenated blood to the capillaries, where the exchange of oxygen and carbon dioxide takes place.
In order for the muscles in the body to function properly, blood is needed. The heart pumps blood to all the important areas throughout the body through an artery known as the aorta (which is the main artery which leads from the body). A thick layer of muscle called the septum which separates both sides of the heart. The deoxygenated blood exits through the right ventricle of the 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.
It accumulates fluid in the lungs, which is called "pulmonary congestion." The body does not get enough blood, nutrients and oxygen. What are the symptoms of heart failure? • Shortness of breath, especially when you lie • Feeling tired, exhaustion • cough or wheezing, especially when the person you exercise or lie • Swelling in the feet, ankles and legs • Weight gain due to retention • Confusion or lack of mental clarity What are the causes? The most common cause of heart failure is coronary artery disease (CAD).
15. Circle of Willis a. The circle of Willis is a section of the circulatory system that includes the internal carotid arteries and the vertebral arteries, as they converge to form a circulation network (Starkey, et al., 2011). b. This circle is used, so that if a cranial artery is obstructed, the design of the circle permits partial blood supply to the area (Starkey, et al., 2011).
The chambers help blood flow smoothly through the heart. The atria chambers are the receiving chambers. Their objective is to receive blood returning to the heart. The blood flow into the atria from the veins and fill the ventricles. The ventricles are the discharged chambers.
The primary circulatory system is made up of the heart, blood, and blood vessels. Blood is carried to the entire body through the blood vessels via the pumping of the heart. Oxygen and nutrients are carried to the cells and carbon dioxide and waste are carried away from the cells. When the heart pumps the blood, it pushes up against the artery, this force is called blood pressure. If the force is too high it is called hypertension.
Two key components of the human body, blood pressure and heart rate, are crucial to determining how healthy a person is. Blood pressure, or the pressure of the blood in the cardiovascular system, is crucial in the human body, because it is the main transportation system that travels to and from cells. Heart rate is the speed of the heartbeat measured by beats per minute. The nervous system and brain contributes to upholding these two critical areas by monitoring and controlling them. The brain and nervous system are able to control both the heart rate and blood pressure due to the two carotid sinuses, that are located in the right and left carotids, and the aortic arch.
The largest muscle in the heart that is located in the left ventricle, pumps the freshly oxygenated blood to all other organs and body parts. Then blood is circulated and exhausted, veins carry it back toward the heart and the right atrium to begin the process again. A human 's heart has two atria and two ventricles. The atria distributes oxygenated blood. The right atrium takes in oxygen and poor blood from the body and pumps it to the right ventricle.
Causes and symptoms Shock is caused by three major categories of problems: cardiogenic (meaning problems associated with the heart 's functioning); hypovolemic (meaning that the total volume of blood available to circulate is low); and septic shock (caused by overwhelming infection, usually by bacteria). Cardiogenic shock can be caused by any disease, or event, which prevents the heart muscle from pumping strongly and consistently enough to circulate the blood normally. Heart attack, conditions which cause inflammation of the heart muscle (myocarditis), disturbances of the electrical rhythm of the heart, any kind of mass or fluid accumulation and/or blood clot which interferes with flow out of the heart can all significantly affect the heart 's ability to adequately pump a normal quantity of blood. Hypovolemic shock occurs when the total volume of blood in the body falls well below normal. This can occur when there is excess fluid loss, as in dehydration due to severe vomiting or diarrhea, diseases which cause excess urination (diabetes insipidus, diabetes mellitus, and kidney failure), extensive burns, blockage in the intestine, inflammation of the pancreas (pancreatitis), or severe bleeding of
How the cardiovascular system works? Image result for the cardiovascular system heart without labels The cardiovascular system consists of two circuits that blood travels through; pulmonary and systemic. Exercise has an impact on these systems, causing the heart to pump blood faster around the body, which allows you to exercise for longer. The pulmonary circuit carries blood to the lungs to get oxygen and then back into the heart, whilst the systemic circuit carries blood around the body to transport the oxygen and returns the de-oxygenated blood to the heart. Image result for real human hearts Function of the heart When your heart beats it pumps blood to the lungs and around all of the body.
The narrowing of these arteries can lead to weakening of the left ventricle due to the increased workload; eventually the left ventricle cannot effectively pump, resulting in blood backing up into the lungs. The fluid is then forced into the blood, through the capillaries and into the alveoli; this is known as congestive heart failure (Mayo Clinic, 2014). Another cause of cardiogenic pulmonary edema is cardiomyopathy. Cardiomyopathy also causes a weakening in the ventricles. Unlike coronary artery disease which is a result of the narrowing of the arteries, cardiomyopathy is caused by damage to the cardiac muscle (Mayo Clinic, 2014).
Transposition of the Great Arteries, Pediatric A good way to understand this condition is to first think about how blood flows in the body. Arteries are blood vessels that carry blood away from the heart to other places in the body. The two largest of these arteries are called the great arteries. One of them, the pulmonary artery, takes blood from the heart to the lungs. In the lungs, oxygen is added to the blood.
If the blood flow to the heart muscles is restricted or blocked it may lead to further complications such as angina, heart attack or heart failure. If the blood flow isn 't restored in time the restricted heart muscles, they begin to die thus this is the start of a heart attack. The dying of the heart muscles is known as infarction. If to many heart
Right-sided heart failure is when the cardiac muscle on the right side of the heart becomes too weak to pump a sufficient amount of deoxygenated blood to the lungs. It is usually a complication of various conditions including lung diseases such as emphysema. This means that less oxygenated blood is taken from the lungs by the pulmonary veins and transported to the left side of the heart to then be pumped around the body. It can also produce a back-up of blood in the vessels within the body. This failure to pump sufficient blood to the lungs results in a build-up of fluid, which is known as oedema.