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Heart is an American rock band formed in 1973 in Seattle, Washington. The band evolved from previous projects led by founding members Roger Fisher (guitar) and Steve Fossen (bass guitar), including The Army (1965–1969), Hocus Pocus (1969–1970), and White Heart (1970–1973). By 1975, original members Fisher, Fossen, and Ann Wilson (lead ...
24 de mar. de 2022 · Español. The heart is an organ about the size of your fist that pumps blood through your body. It is made up of multiple layers of tissue. Your heart is at the center of your circulatory system. This system is a network of blood vessels, such as arteries, veins, and capillaries, that carries blood to and from all areas of your body.
27 de jul. de 2022 · The heart contains electrical "pacemaker" cells, which cause it to contract — producing a heartbeat. "Each cell has the ability to be the 'band leader' and [to] have everyone follow," Phillips said.
15 de may. de 2024 · Sometimes heart disease may be "silent" and not diagnosed until a person experiences signs or symptoms of a heart attack, heart failure, or an arrhythmia. When these events happen, symptoms may include: 1. Heart attack: Chest pain or discomfort, upper back or neck pain, heartburn, nausea or vomiting, extreme fatigue, dizziness, and shortness of ...
10 de mar. de 2015 · Endocardium: The innermost layer is thin and smooth. The heart is divided into four chambers: two atria and two ventricles. Blood is transported through the body via a complex network of veins and ...
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9 de may. de 2018 · Each day, your heart beats around 100,000 times. This continuously pumps about five litres (eight pints) of blood around your body through a network of blood vessels called your circulatory system. This blood delivers oxygen and nutrients to all parts of your body to help your organs and muscles work properly.
