As the ventricular pressure increases, the AV closes. This then result into a brief period of time when the semilunar valves and AV valves are both closed. Describe the relationship of pressure in the ventricle to atrium and aorta during this time. What is this phase called?
As the ventricular pressure increases, the AV closes. This then result into a
brief period of time when the semilunar valves and AV valves are both closed.
Describe the relationship of pressure in the ventricle to atrium and aorta
during this time. What is this phase called?
Heart
Heart is a mesodermal origin. It is located in the thoracic (chest) cavity(under the rib cage), in between the two lungs (slightly tilted to the left lung), behind the sternum and above the diaphragm. Heart is protected by a double walled pericardium membrane filled with pericardium fluid which protects the heart and reduces friction between the layers.
Size of heart :- It is the size of a clenched fist(curl fingers of hand tightly). At early age heart size is the same as the clenched fist size but at adults it is slightly larger than the clenched fist. Weight is 250-300 gram.
Shaped :- It is shaped like an inverted cone or upper side down pear shaped.
Function of heart
- It pumps oxygenated blood from the heart to the other body part. And it also receives deoxygenated blood from tissue and cell and pumps into the heart
- It is also responsible for the maintenance of blood pressure.
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