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Heart: A powerful muscle slightly larger than a clenched fist. It is composed of four chambers, two upper (the atria) and two lower (the ventricles). It works as a pump to send oxygen-rich blood through all the parts of the body. A human heart beats an average of 100,000 times per day.
The human heart is a muscle, about the size of your fist. It works like a pump, sending blood around your body, allowing your organs to function. If you are being treated for heart rhythm problems, you may find it helpful to read this factsheet in order to understand how your heart and its electrical system functions.
Cardiac muscle is an involuntary striated muscle, which is mononucleated and has cross-striations formed by alternate segments of thick and thin protein filaments,
The Muscles of the Heart •The heart has specific muscles that cause the heart to contract and open and close the heart values. Some of these muscles are: •Trabeculae Carneae –Irregular muscles of the ventricles •Chordae Tendineae –Small cords that connect the heart values to the papillary muscles
4 Ιουν 2018 · The heart is a hollow muscular organ located in the thoracic cavity, in the middle mediastinum behind the sternum, and in front of the esophagus, aorta, and vertebral column (Mahadevan 2018...
The muscle pattern is elegant and complex, as the muscle cells swirl and spiral around the chambers of the heart. They form a figure 8 pattern around the atria and around the bases of the great vessels.
3 Νοε 2023 · The heart is a muscular organ that pumps blood around the body by circulating it through the circulatory/vascular system. It is found in the middle mediastinum, wrapped in a two-layered serous sac called the pericardium. The heart is shaped as a quadrangular pyramid, and orientated as if the pyramid has fallen onto one of its sides so that its ...
