Question
Question: The blood vascular system of mammals is known as double vascular system because...
The blood vascular system of mammals is known as double vascular system because
A
A group of veins carry oxygenated and other group conduct deoxygenated blood
B
Oxygenated blood runs from heart to different organs by one set of veins while deoxygenated blood runs from heart to lung by another set
C
The two different systems never meet
D
All of the above
Answer
All of the above