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प्रश्न
When are the sounds ‘LUBB’ and ‘DUB’ produced during heartbeat ?
उत्तर
The first sound ‘LUBB’ is produced when the atrioventricular valves get closed sharply at the start of ventricular systole. The second sound ‘DUB’ is produced at the beginning of ventricular diastole when the semilunar valves, at the roots of aorta and pulmonary artery get closed.
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संबंधित प्रश्न
Name the following:
The phase of the cardiac cycle in which auricle contracts.
Choose the correct answer:
Bundle of 'His' is found in ___________
The help of a well-labelled diagram describes the internal structure of the human heart.
State the Location: Semilunar valves of the heart
In ____________ of a mammalian heart O2 rich blood enter first.
Heart is covered with double-walled membrane called ______.
Give scientific reason.
Human heart is called as myogenic and autorhythmic.
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.
