(a)[6]
Fill in the table by entering one letter, A to G, for each blood vessel name or description.
(b)[3]
Explain why blood flow through the human circulatory system is called a double circulation.
Biology 5090 · O Level · Blood vessels
Blood vessels — practice question
The diagram illustrates how the main blood vessels are arranged in the human circulatory system. The arrows indicate the direction in which blood flows through each vessel.