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प्रश्न
Describe pericardium.
उत्तर
- The heart is enclosed in a membranous sac called the pericardium.
- The pericardium is formed of two main layers - outer fibrous and inner serous pericardium.
- Serous pericardium is soft, moist, and elastic. It is formed of squamous epithelium and is further divisible into two layers as a parietal and visceral layer.
- Parietal and visceral layers of serous pericardium are separated by a pericardial space.
- This space is filled with pericardial fluid (about 50ml) which acts as a shock absorber and protects the heart from mechanical injuries.
- It also keeps the heart moist and acts as a lubricant.
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संबंधित प्रश्न
Where does blood absorb oxygen?
What prevents the backflow of blood inside the heart during contraction?
State the Function: Pericardium
In between which layers of pericardium, pericardial fluid is present?
Name the heart valve associated with the major arteries leaving the ventricles.
Why are the walls of the left ventricle thicker than the other chambers of the heart?
______ valve is present at the opening of coronary sinus
Explain the term Chordae tendinae.
If a person has a heart attack, what must be done immediately?
P. Loosen his/her clothing
Q. Make him/her lie down in an airy room
R. Rush him/her to the hospital
S. Engage him/her in a conversation
When a person suffers from chest pain, the doctor immediately takes an ECG. Visit a doctor and get information about ECG. You may even look up an encyclopaedia or the internet.
