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Nov 10, 2024 · The heart is a muscular organ that pumps blood throughout the body via the circulatory system. It is approximately the size of a fist and consists of four chambers: two atria and two ventricles. The heart is composed of specialized muscle tissue, known as myocardium , and is encased within a double-layered protective sac called the pericardium .
Oct 31, 2024 · In humans and other mammals and in birds, the heart is a four-chambered double pump that is the centre of the circulatory system. In humans it is situated between the two lungs and slightly to the left of centre, behind the breastbone; it rests on the diaphragm , the muscular partition between the chest and the abdominal cavity .
- The Editors of Encyclopaedia Britannica
- In humans, the heart is situated between the two lungs and slightly to the left of center, behind the breastbone. It rests on the diaphragm, the mu...
- The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and ano...
- The pumping of the heart, or the heartbeat, is caused by alternating contractions and relaxations of the myocardium. These contractions are stimula...
- The rhythmic noises accompanying the heartbeat are called heart sounds. The two distinct sounds are heard, a low, slightly prolonged “lub” (first s...
Sep 4, 2024 · Where is it located? Your heart is located in the middle of your chest. It connects to your blood vessels, which go everywhere throughout your body. What are the parts the circulatory system is made of? Your heart and blood vessels make up your circulatory system. Each of these plays a role in moving blood through your body.
Jun 11, 2024 · The heart is the pump that moves blood around your body. It has four main parts: two upper chambers called atria and two lower chambers called ventricles. These parts work together to get oxygen-rich blood to your body and oxygen-poor blood back to your heart.
- Anemia
- Leukemia
- Thrombocytopenia
- Hemophilia
Anemia is a blood disorder affecting red blood cells. Patients suffering with anemia have a decreased oxygen carrying capacity due to a decrease in the number of red blood cells, or a reduced amount of haemoglobin in the blood. There are multiple different types of anemia, some of which are the following: 1. Iron deficient anemiais the most common ...
Leukemia refers to a group of cancers affecting the red bone marrow . Theses cancers cause abnormal white blood cells to multiply uncontrollably, which interferes with normal red blood cell, white blood cell and platelet production. This results in a decrease in oxygen carrying capacity, susceptibility to infection, and abnormal clotting. Leukemia ...
This is a disorder of the thrombocytes, or platelets. It results in a low number of platelets in the blood. Patients with this disorder are prone to excessive bleeding and may experience frequent nose bleeds or bleeding gums, as well as excessive bruising.
This is an inherited blood disorder that causes spontaneous bleeding or bleeding where only minor trauma has occurred. It is caused by deficiencies of different clotting factorsand can vary significantly in severity.
The heart is located under the rib cage -- 2/3 of it is to the left of your breastbone (sternum) -- and between your lungs and above the diaphragm. The heart is about the size of a closed fist, weighs about 10.5 ounces, and is somewhat cone-shaped. It is covered by a sack termed the pericardium or pericardial sack.
Heart and blood vessels together make the circulatory system. [2] . The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. [3] .
