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
the Biological/technical term for The vein which drains the blood from the intestine to the liver.
Explain Pulse
With which human organ system (or human systems) is the vena cava associated?
Match the items in Column ‘A’ with those in column ‘B’ Rewrite the correct matching pairs.
| Column A | Column B | ||
| (a) | SA Node | (i) | Plasma |
| (b) | Defective haemoglobin in RBC | (ii) | Serum |
| (c) | Muscle fibres located in heart | (iii) | Pacemaker |
| (d) | The liquid squeezed out of blood during clotting | (iv) | Sickle cell anaemia |
| (e) | Never tires, keep on contracting and relaxing | (v) | Purkinje fibres |
| (f) | Cardiac cycle | (vi) | Cardiac muscle |
| (g) | Liquid part of the blood without corpuscles | (vii) | 0·85 sec |
Define the Veins.
Explain the Term
Hepatic Portal System
The artificial method of filtering the blood or removing the wastes from the blood.
Why do we call saliva a digestive juice?
Which of the following is TRUE regarding leucocytosis?
A resting person usually has a pulse rate between 72 to 80 beats per minute.
