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Oct 31, 2024 · heart, organ that serves as a pump to circulate the blood. It may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one or more receiving chambers (atria) and a main pumping chamber (ventricle), as in mollusks. In fishes the heart is a folded tube, with three or four enlarged areas that correspond ...
- Kids
The heart is made of very strong muscle. This muscle pumps...
- Coronary Heart Disease
Coronary heart disease, disease characterized by an...
- Heart Rate
heart rate, the number of times the ventricles of the heart...
- Pulmonary Circulation
pulmonary circulation, system of blood vessels that forms a...
- Heart Murmur
heart murmur, condition characterized by prolonged noises...
- Students
Encyclopædia Britannica, Inc. A muscular, pear-shaped organ...
- Ventricle
ventricle, muscular chamber that pumps blood out of the...
- Chambered Heart
Other articles where chambered heart is discussed:...
- Kids
Jun 11, 2024 · Heart Anatomy in Basic Terms. The heart is a crucial organ that functions as the body's pump, ensuring blood circulation throughout the body. It consists of four main chambers: Left and right atria (upper chambers) Left and right ventricles (lower chambers) These chambers work in a coordinated manner to receive oxygen-poor blood, pump it to the ...
Mar 10, 2015 · The heart has three layers. They are the: Epicardium: This thin membrane is the outer-most layer of the heart. Myocardium: This thick layer is the muscle that contracts to pump and propel blood ...
- Pericardium
- Structure of The Heart Wall
- Chambers of The Heart
- Valves of The Heart
- Conduction System of The Heart
The heart sits within a fluid-filled cavity called the pericardial cavity. The walls and lining of the pericardial cavity are a special membrane known as the pericardium. Pericardium is a type of serous membrane that produces serous fluid to lubricate the heart and prevent friction between the ever beating heart and its surrounding organs. Besides ...
The heart wall is made of 3 layers: epicardium, myocardium and endocardium. 1. Epicardium. The epicardium is the outermost layer of the heart wall and is just another name for the visceral layer of the pericardium. Thus, the epicardium is a thin layer of serous membrane that helps to lubricate and protect the outside of the heart. Below the epicard...
The heart contains 4 chambers: the right atrium, left atrium, right ventricle, and left ventricle. The atria are smaller than the ventricles and have thinner, less muscular walls than the ventricles. The atria act as receiving chambers for blood, so they are connected to the veins that carry blood to the heart. The ventricles are the larger, strong...
The heart functions by pumping blood both to the lungs and to the systems of the body. To prevent blood from flowing backwards or "regurgitating" back into the heart, a system of one-way valves are present in the heart. The heart valves can be broken down into two types: atrioventricular and semilunar valves. 1. Atrioventricular valves. The atriove...
The heart is able to both set its own rhythm and to conduct the signals necessary to maintain and coordinate this rhythm throughout its structures. About 1% of the cardiac muscle cells in the heart are responsible for forming the conduction system that sets the pace for the rest of the cardiac muscle cells. The conduction system starts with the pac...
Jan 26, 2024 · Your heart’s main function is to move blood throughout your body. Blood brings oxygen and nutrients to your cells. It also takes away carbon dioxide and other waste so other organs can dispose of them. Your heart also: Controls the rhythm and speed of your heart rate. Maintains your blood pressure.
Aug 26, 2024 · The heart is a muscular organ responsible for the flow of blood in the body. The heart has a right and a left side, each with an upper chamber (atrium) and lower chamber (ventricle). The right atrium receives oxygen-deprived blood from the body. The blood travels across the tricuspid valve into the right ventricle, which pumps the blood across ...
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The heart is an amazing organ. It starts beating about 22 days after conception and continuously pumps oxygenated red blood cells and nutrient-rich blood and other compounds like platelets throughout your body to sustain the life of your organs. Its pumping power also pushes blood through organs like the lungs to remove waste products like CO2.
