What is the cardiovascular system? The heart and circulatory system (also called the cardiovascular system) make up the network that delivers blood to the bodys tissues. With each heartbeat, blood is sent throughout our bodies, carrying oxygen and nutrients to all of our cells
Pulmonary circulation Pulmonary circulation is the movement of blood from the heart, to the lungs, and back to the heart again.
Sistematic circulation Systemic circulation supplies nourishment to all of the tissue located throughout your body, with the exception of the heart and lungs because they have their own systems
It is made up by The circulatory system is composed of the heart and blood vessels, including arteries, veins, and capillaries.
The Heart The heart is the key organ in the circulatory system. As a hollow, muscular pump, its main function is to propel blood throughout the body. It usually beats from 60 to 100 times per minute, but can go much faster when it needs to. It beats about 100,000 times a day, more than 30 million times per year, and about 2.5 billion times in a 70- year lifetime.
The arteries arteries. They are the thickest blood vessels, with muscular walls that contract to keep the blood moving away from the heart and through the body. In the systemic circulation, oxygen-rich blood is pumped from the heart into the aorta.
The veins The veins are not as muscular as arteries, but they contain valves that prevent blood from flowing backward. Veins have the same three layers that arteries do, but they are thinner and less flexible. The two largest veins are the superior and inferior vena cavae. The terms superior and inferior do not mean that one vein is better than the other, but that they are located above (superior) and below (inferior) the heart.
The capillaries The capillaries are one of the most important parts of the circulatory system because it is through them that nutrients and oxygen are delivered to the cells. In addition, waste products such as carbon dioxide are also removed by the capillaries.
The blood The blood is fluid that circulates in the principal vascular system of human beings and other vertebrates, in humans consisting of plasma in which the red blood cells, white blood cells, and platelets are suspended.
Cardiac cycle Systole represents the time during which the left and rightDiastole period when ventricles contract and ejectventricles are relaxed blood into the aorta and pulmonary artery, respectively.
circulatory system problemsCongenital heart defects: Congenital heart defects are heart problems that babies have at birth. A common sign of a congenital heart defect is a heart murmur. A heart murmur is an abnormal sound (like a blowing or whooshing sound) thats heard when listening to the heart.Arrhythmia: Cardiac arrhythmias, which are also called dysrhythmias or rhythm disorders, are problems in the rhythm of the heartbeat.Cardiomyopathy: is a long-lasting disease that causes the heart muscle (the myocardium) to become weakened. Usually, the disease first affects the lower chambers of the heart, the ventricles, and then progresses and damages the muscle cells and even the tissues surrounding the heart.Coronary artery disease: Coronary artery disease is the most common heart disorder in adults, and its caused by atherosclerosis.Hypercholesterolemia (high cholesterol): Cholesterol is a waxy substance that is found in the bodys cells, in the blood, and in some of the foods we eat. Having too much cholesterol in the blood, also known as hypercholesterolemia) or hyperlipidemia is a major risk factor for heart disease and can lead to a heart attack.Hypertension (high blood pressure): Hypertension is when a person has blood pressure thats significantly higher than normal. Over time, it can cause damage to the heart and arteries and other body organs.Rheumatic heart disease: Teens who have had strep throat infection may develop rheumatic fever. This type of infection can cause permanent heart problems
Care of the cardiovascular system of exercise, eating a nutritious diet, maintaining a healthy weight, and seeing your doctor regularly for medical checkups are the best ways to help keep the heart healthy and avoid long-term problems like high blood pressure, high cholesterol, and heart disease.
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