Advertisements
Advertisements
प्रश्न
Veins have valves at intervals in their inner lining whereas the arteries do not have valves. Explain.
Advertisements
उत्तर
In arteries blood flows with pressure but in veins the pressure falls considerably and the back flow of blood is prevented by the semilunar valves.
APPEARS IN
संबंधित प्रश्न
Haemoglobin is present in ______ cells.
Describe the circulatory system of humans.
Give reason for the following:
Only the veins and not the arteries are provided with valves.
During surgical operations or during accidents, the patient may be given blood from outside to save his life. What is the technical name of this process? Briefly explain the precautions to be taken in this process.
Multiple choice questions. Tick ( ✓ ) the correct choice:
The blood vessels in which blood goes away from the heart to different body parts are
Short answer question.
Write a note on blood plasma.
Why do we call saliva a digestive juice?
Identify the CORRECT statement/s regarding blood clotting.
Name these:
Two kinds of circulatory systems in different animals.
