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- It has four chambers which contract in a specific order, allowing the human heart to pump blood from the body to the lungs and back again with high efficiency. The heart also contains “pacemaker” cells which fire nerve impulses at regular intervals, prompting the heart muscle to contract.
biologydictionary.net/heart/Heart (Human Anatomy): Overview, Function & Structure | Biology
Oct 31, 2024 · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the center of the circulatory system in humans, other mammals, and birds.
- Kids
Heart disease can lead to a heart attack. A heart attack...
- 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
In humans, the ventricles are the two lower chambers of the...
- Chambered Heart
Other articles where chambered heart is discussed:...
- Kids
Nov 10, 2024 · The heart is a four-chambered muscular organ with a complex structure that allows it to efficiently pump blood throughout the body. It is divided into two halves—the right and left sides—each responsible for different aspects of circulation. The heart consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle.
- How Blood Circulates in The Heart
- Structure of The Heart
- What Is A Heartbeat?
- What Is An Arrhythmia?
- Cardiovascular Diseases
- References
- Further Reading
The heart consists of four chambers, four one-way valves, and a set of arteries and veins that regulate the normal flow of blood within the body. The smooth functioning of the circulatory system is maintained by a complex network of blood vessels that circulate blood throughout the body and back to the heart. Whereas veins bring deoxygenated blood ...
The heart wall is composed of three layers, including the outer epicardium (thin layer), middle myocardium (thick layer), and innermost endocardium (thin layer). The myocardium is made up of cardiac muscle fibers and is responsible for the contraction and relaxation that results in the pumping of the heart. The two atria have a thinner myocardium l...
On average, the heart beats 100,000 times a day and circulates about 5.6 liters of blood throughout the body three times a minute. The cardiac cycle, also known as the heartbeat, begins with deoxygenated blood collecting in the right atrium. Simultaneously, the left atrium gets filled with oxygenated blood from the lungs. The sinoatrial node (SA no...
An electrocardiogram (ECG) records electrical signals in the heart and is visualized in the form of several distinct waves. Cardiac disorders and cardiovascular diseases can be monitored using an ECG. Arrhythmia, or irregular heartbeat, occurs when the electrical signals that regulate the cardiac cycle are abnormal. Ventricular tachycardia is an ar...
Valve malformations and diseases result in a staggering amount of deaths each year. Stenosis, which is the obstructed outflow of blood and regurgitation or backward flow of blood due to defective closure of valves, are manifestations of valve diseases. Heart sounds are caused by vibrations produced during the closure of valves. Abnormal heart sound...
The Cardiovascular System [Online]. Available from: http://www.vascularconcepts.com/content/pages.php?pg=patients_cardio_system&page=cardiac_cycleAnatomy of the Heart [Online]. Available from: https://www.acls.net/anatomy-of-the-human-heart.htmHow your heart works [Online]. Available from: https://www.bhf.org.uk/informationsupport/how-a-healthy-heart-worksStructure of the heart [Online]. Available from: https://training.seer.cancer.gov/anatomy/cardiovascular/heart/structure.htmlOct 4, 2019 · Heart Structure. The heart’s unique design allows it to accomplish the incredible task of circulating blood through the human body. Here we will review its essential components, and how and why blood passes through them. Layers of the Heart Wall. The heart has three layers of tissue, each of which serve a slightly different purpose. These are:
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.
Describe the internal and external anatomy of the heart. Identify the tissue layers of the heart. Relate the structure of the heart to its function as a pump. Compare systemic circulation to pulmonary circulation. Identify the veins and arteries of the coronary circulation system.
Mar 24, 2022 · Myocardium is the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body. Pericardium is the sac that surrounds your heart. Made of thin layers of tissue, it holds the heart in place and protects it.
