Advertisements
Advertisements
प्रश्न
Who discovered the Rh factor? Why was it named so?
Advertisements
उत्तर
The Rh factor was discovered by Landsteiner and Wiener in 1940 in Rhesus monkey. So it was named the Rh factor.
APPEARS IN
संबंधित प्रश्न
What makes the blood look red?
The liquid connective tissue A circulates in our body continuously without stopping. This tissue contains a pigment B which imparts it a colour C. The tissue A consists of four components D, E, F and G. The component D fights infection and protects us from diseases. The component E helps in the clotting of tissue A if a person gets a cut. The component F is a liquid which consists mainly of water with many substances dissolved in it and component G carries oxygen from the lungs to all the parts of the body.
(a) What is (i) tissue A (ii) pigment B, and (iii) colour C?
(b) Name (i) D (ii) E (iii) F, and (iv) G.
(c) Name one substance (other than oxygen) which is transported by tissue A in the human body.
(d) Which two components of tissue A are the cells without nucleus?
(e) Name any two organisms ( animals) which do not have liquid like A in their body.
Name the following:
Components of blood
Mature RBC in mammals does not have cell organelles.
The blood leaving the tissues becomes richer in
Veins have valves that allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?
What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?
Why is it called an artery if it does not carry oxygen-rich blood?
Paheli noticed water being pulled up by a motor pump to an overhead tank of a five-storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell me why?
Find out about blood groups and their importance.
