Advertisements
Advertisements
प्रश्न
When are the sounds "LUBB" and "DUP" produced respectively during heart beat?
Advertisements
उत्तर
- The first sound LUBB, is produced when the atrioventricular valves, i.e. tricuspid and bicuspid, valves close at the start of ventricular systole.
- The second sound, DUBB, is produced at the beginning of ventricular diastole when the pulmonary and aortic semilunar valves close.
APPEARS IN
संबंधित प्रश्न
Angina pectoris is due to
Why do people have a common belief that the heart is located on the left side of the chest?
Give reason for the following:
Only the veins and not the arteries are provided with valves.
Give reason for the following:
The arteries are deep seated in the body
Match the items given in Column A with the most appropriate ones in Column B and REWRITE the correct matching pairs :
Column A Column B
(i) Cranial nerves Testosterone
(ii) Leydig cells Natural reflex
(iii) Acetylcholine 12 pairs
(iv) Spinal nerves Prolactin
(v) Sneezing Neurotransmitter
- 18 pairs
- 31 pairs
- Conditioned reflex
Fill in the blanks with suitable words given below:
The oxygen-rich blood is pumped into different parts of the body through ______.
True or false:
The four blood groups in human beings are A, B, AB and AO
What are seen as greenish blue lines in our hands and legs?
All the waste products of the body are excreted through the circulatory system.
Which of the following is the main site of erythropoiesis in adults?
