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The heart pumps blood through our body, thus keeping the bloodstream upright. In this manner, it ensures that the blood reaches all the organs, tissues and cells, and this supply of oxygen and nutrients.
Functionally, the heart is (fachsprachlich: Cor) a hollow muscle with multiple chambers (two atria, two chambers of the heart) and pump function. If necessary, the heart can multiply its pumping capacity - for example labor.
Essentially, the bloodstream supplies the entire body through two subcircuits with blood:
In the systemic circulation it prevails in the blood vessels, a greater pressure than in the pulmonary circulation. Both circuits only work together and are in parallel.
The heart is not normal in the body but slightly inclined (about 40 degrees) and slightly rotated. The length of a healthy adult heart is about 12 centimeters, the width of about 8 to 9 cm - it is typically about the size of a clenched fist of the person concerned. The heart weighs about 300 grams in males and 250 grams in women.
On average, the heart summarizes 0.6 to 1 liter of blood. The stroke volume, Thus, the moving amount of blood per muscle contraction in the state of rest, is about 70 milliliters.
Video: How the heart works