We have seen many kinds of preloaders these days. without loading animation, the user sees the blank page and occasionally he might think something is wrong. it gives the user a confirmation that the app or the website is not crashed. On many occasions, loading animations are used as the first UX element. Preloaders are pretty useful for resource-intensive websites and applications. adopted from wikipedia, " heart", available under CC BY-SA License.Preloaders are often used for slow loading websites/ applications to notify the user that the website is still loading or it’s not crashed. Specialists who focus on diseases of the heart are called cardiologists, although many specialties of medicine may be involved in treatment. Diagnosis of heart disease is often done by the taking of a medical history, listening to the heart-sounds with a stethoscope, ECG, and ultrasound. Cardiovascular diseases frequently do not have symptoms or may cause chest pain or shortness of breath. Risk factors include: smoking, being overweight, little exercise, high cholesterol, high blood pressure, and poorly controlled diabetes, among others. Of these more than three quarters are a result of coronary artery disease and stroke. ![]() Exercise temporarily increases the rate, but lowers resting heart rate in the long term, and is good for heart health.Cardiovascular diseases (CVD) are the most common cause of death globally as of 2008, accounting for 30% of deaths. The heart beats at a resting rate close to 72 beats per minute. Oxygenated blood then returns to the left atrium, passes through the left ventricle and is pumped out through the aorta to the systemic circulation−where the oxygen is used and metabolized to carbon dioxide. From here it is pumped into the pulmonary circulation, through the lungs where it receives oxygen and gives off carbon dioxide. The heart receives blood low in oxygen from the systemic circulation, which enters the right atrium from the superior and inferior venae cavae and passes to the right ventricle. These generate a current that causes contraction of the heart, traveling through the atrioventricular node and along the conduction system of the heart. The wall of the heart is made up of three layers: epicardium, myocardium, and endocardium.The heart pumps blood with a rhythm determined by a group of pacemaking cells in the sinoatrial node. The heart is enclosed in a protective sac, the pericardium, which also contains a small amount of fluid. In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. Fish, in contrast, have two chambers, an atrium and a ventricle, while reptiles have three chambers. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. ![]() In humans, the heart is located between the lungs, in the middle compartment of the chest.In humans, other mammals, and birds, the heart is divided into four chambers: upper left and right atria and lower left and right ventricles. Blood provides the body with oxygen and nutrients, as well as assisting in the removal of metabolic wastes. The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |