AIIMS Biology: Questions 255 - 261 of 405
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Question number: 255
Question number: 256
Question number: 257
Question number: 258
Question number: 259
Question number: 260
Mammals are said to have a “double circulatory system”. This means that
The blood circulates twice as quickly.
There are two system; one from the heart to the lungs and back to the heart and other to and from rest of the body.
The blood vessels are paired.
There are two types of blood vessels attached to every organ; an artery and a vein.
Question number: 261
The blood vascular system of mammals is known as double vascular system because
A group of veins carry oxygenated and other group conducts deoxygenated blood.
The two different systems never meet.
Oxygenated blood runs from heart to different organs by one set of veins while deoxygenated blood runs from heart to lung by another set.
|d.||All a. , b. and c. are correct|